Don't keep, very dated.

The treatment issue not dated or out of fashion. IMO, it is the simple, clean way to dress a large window/door. The linen is lovely look and I can see, just from your photo, that the former owner had great taste and money to spend.

Keep them. Additionally, because there is a single door to be opened, it really is the best solution.

Which way is the stack back?

Don't keep

They open in center. There are3 doors 2 stationary only center opens

I understand that they are well made, but that doesn't preclude them from being dated. I would want to replace them, but might not hurry to do so. They're functional and obviously in great condition, so I might focus elsewhere for starters.

Before you get rid of them, research what you would use to replace them.

When we replaced our verticals the only practical, pretty answer was to replace the sliders with French Doors that have blinds between the glass. We’re happy with our decision, but they may not work for you.

I had these on a sliding door, a large 9 foot front window and french doors and finally removed; it was the best decision ever as it completely changed the rooms and highly recommend removing. You could add drapes from IKEA at little cost, which I used and really like them.

With only the middle door opening, three simple blinds would work. If budget is limited, use drapes for now and add later. if you feel they are needed

I like them. Some people get swallowed up by finding some concepts "dated". I find that dated... if they work for you, and YOU like them - keep them. As you note, there may be more important places for improvements in your new home.

Focus on the other things you need to save your budget for first and for the love of heaven, do your research on what you're going to replace them with BEFORE you remove them. Sliding doors are a particular challenge for window coverings. Then, make sure you allocate enough money for the solution. A 10'x10' window is not inexpensive to cover with anything of quality and excellent function.

Keep. For as long as you need (and can stand). They're probably the most practical window dressing option for large patio windows and the ones you have are neutral and unobtrusive. Verticals allow great light control and are easy to open and close. They also don't impede traffic or furniture arrangement and take up little wall. We had some in our family room and replacing them cost us a lot of time (first option didn't work - we needed blackout) and money. As others have said, research whatever replacement options you want carefully before moving forward. Call window dressing pros for estimates and prepare yourself for sticker shock. If you go with curtains, don't forget to calculate/plan the stack back well. You don't want the curtains to block the light when open or get dirty every time you open the slider door. Even the designer who helped us finagle our solution didn't do this properly. :/

Window treatments are a (costly) challenge. When you have long list of projects to do in a home, I wouldn't prioritize replacing functional window treatments.

I would go with drapes. The vertical blinds look like prison bars from outside LOL. There is a new home built in my area I passed a few times thinking they put security bars up. We live rural people don't lock doors so it was interesting. I finally slowed down and its the dark vertical blinds LOL. The person obviously doesn't care about being up to date The ones you have are still in good shape but just not visual appealing. IMO So if you like keep I have 2 windows with french door between. I hung drapes I made drapes for 15 ft wide x 108 in tall. I'm able to full open or close for privacy or TV I'm sure that could be expensive for those that don't sew. Enjoy your new budget what your must change vs what you can live with until funds are available.

I would definitely keep them.

"The vertical blinds look like prison bars from outside LOL. There is a new home built in my area I passed a few times thinking they put security bars up. We live rural people don't lock doors so it was interesting. I finally slowed down and its the dark vertical blinds LOL. The person obviously doesn't care about being up to date"

Sorry, Rehabit, I don't "get" the LOLs here. (I can't tell if I'm losing my sense of humour.) Perhaps your new neighbours "inherited" the blinds from family or friends. New build or not, a house is expensive to furnish. I know I appreciated the help when furnishing our house. Not everyone can do everything "up to date" at once. That said, vertical blinds are still being sold so "passé" is relative.

As others have said before me, do some research to see what you might replace them width and prepare for sticker shock. I think well made and good looking verticals are the perfect answer to patio door treatments.

While many people trying to avoid what they consider “dated” end up twisting themselves into knots trying to find something different and end up with skimpy, poofy or overly long or short drapery, all without the practicality of verticals, verticals control brightness and privacy well without intruding into your space.

If you have sun control issues, especially if the window is west facing or you live in the desert southwest, verticals work best. I'd keep them.

My idea of “dated” is heavy draperies overwhelming a window. Judging from your photo, it doesn’t look like you have the space for a full set of draperies. It would be a lot of fabric, lined, rod appropriate to carry the weight. Now you have heavy hardware to replace the clean, simple look.

The beauty of quality verticals is they stack back to 7”. or less. If you want some fabric on the window, you need only install non-operable 54” panels over the stack backs.

As for the jailhouse look, be consoled that it will be only when the hot sun is flooding the room.

I have a 14' long wall (10' ceilings) with windows on each end and sliding patio door in the center in my tv room. I removed the previous owner's verticals (and awful fabric-covered wood valance) and hung off white linen panels across the entire wall, with drapery batons (right word?) in the center. I close them at night for privacy but can open them as much or as little as I want, and I can push them into the corners in front of the windows - very easily "scrunched" together. They are "casual" grommet-top panels and I bought two rods and combined into one long rod. I used the same panels on the kitchen wall - same design of windows next to sliding door. Even my husband who has no idea how to decorate a room said, "that was a good idea."

(Tip: If you use drapery batons (word?), make sure to order long ones because of your 10' ceiling.)

At one time I had a 70'+ wall of glass doors in a walkout lower level with 12' ceilings and used verticals (hey, it was the 90's) and I swore never again just from the having to clean them standpoint. Every time I climbed a stool to start cleaning/dusting them, I cursed them but kept them because they were custom made and expensive. I saw later that the people who bought our house took them down. ;>)

The drawback to curtains is they don't filter light the way verticals do. Curtains are either open or closed while verticals rotate to let in the amount of light you want across the whole window. That's their biggest advantage over curtains. Doubt anyone here is saying they're the cat meow's in terms of design for all spaces but they're hella practical for light control on large window expanses.

The Shade Store offers XL verticals. I think they can look chic in a modern contemporary space.

(I often notice the lack of window treatments on those large window walls in HGTV makeover shows. I don't know what they use to control the sun in those indoor-outdoor rooms. UV window film?)

I love them. They are good looking and also function beautifully in your home.

Folks either like or vehemently hate vertical blinds.

They are not 'dated' because they are still available.

And if someone is worried about having currently popular window treatments--think of what a money pit the window will be over the years.