I just had 3 cm quartz countertop installed onto a completely serviceable set of 1979 walnut motif cabinets over a 50 foot x 2.2 foot wide kitchen cabinent run. (The only thing missing compared to today's products is the concealed European hinges/springs - happily I convinced my wife that my old hinges, although a bit old-fashioned, are serviceable, Counter guys came and templated the job putting a joint mid-point at the new composite white sink placement and at one side of the stovetop. The templaters were then the installers a week later. After they prepositioned the 3 pieces of ca. 500 pounds quartz pieces they called my attention to the fact that my cabinents were not level and proposed some "on the fly" leveling with wedges along the entire 50 foot run. Because that effort seemed to me to be unruly amd imprecise, I told them just to minimize discontinuities at the sink and cooktop joints while I wasn't looking. The project turned out great with an almost imperceptable lack of parallelism at the vertical at the front sink joint (This avoided shimming all over the place to correct a 0.5" runout error over the 50 foot run which except to a 0.16" modestly imperfect joint; because it is quartz, one cannot tell much by looking, but the level tells the story with which I easily live with!

I left off the picture of the field tile being installed. The backsplash for the long vanity will basically be the field tile as shown in this picture. Seems like everything is pale in the room right now. Would having a dark pop of color (maybe dark or darker gray) be too much of a contrast if that was the only dark color in the room? (the floor isn't too light but it looks like wood and has a rustic style so one could say it looks a bit "washed out".)

I don't do anything but granite with undermount sinks, usually kohler's. For bathrooms, I find that very little dirt accumulates under the rim - kitchens, on the other hand, are a commpletely different story, though, I do granite and undermount stainless sinks in that application. Granite is a real eye-catcher - it's all the rage with home buyers.

I can tell you that a waterfall resting directly on a floating LVP floor will definitely cause issues. After a full year we have major flooring issues with buckling around the waterfall area. That’s what you get for hiring a cheap contractor that doesn’t think these things through. I am now renovating another property and thinking this through ahead of time and found this thread on what to do. It sounds like the stainless steel button should do the trick and be totally hidden. This should allow the floating floor to slide underneath the waterfall edge and allow for an expansion gap while keeping everything hidden without the use of caulking.