I know how annoying it is when you can't even have a conversation because the noise of the floor is great. We have the same problem with a locking type of flooring (Preverco engineered hardwood) and I had assumed that because it was locking and no glue was used, that makes it creak more (wood rubbing on wood). In our case, there are issues with the concrete subfloor level AND with too small of expansion gaps, so it might not be the floor's fault. But I did want to point out that you won't necessarily avoid it with something that locks.

I had wood-look laminate in a prior home that used to sound exactly like popping bubble wrap. It only happened around the perimeter of the rooms. Every morning while I drank my morning coffee, I used to walk around the perimeter of the rooms and pop them. They would then be fine for awhile. They were active during humidity changes, would be fine and not pop for days/weeks if the weather pattern was stable. I liked the looks and utility of the floor and mine never really bothered me all that much. I agree it's weird to have to pop your floors, but because mine would be silent for days after I popped them I guess it just never rose to a real problem for me. I'm also one of those weirdos who enjoys popping bubble wrap, so take that for what it's worth too. ha ha.

If you choose to buy yourself some time (7-10 years) I would suggest screwing down the boards that squeak. The sound comes from METAL (ie. nails) rubbing up and down on wood (the flexing boards). If they are screwed down, the movement AND the rubbing stops. To do this you will walk over the floor (in grid like pattern) and with a red pencil/pen you will circle the areas the create noise AND the areas that make all the movement. You will then go back around and screw down those areas until your noises are reduced to the point of acceptable. Once that is done, you can then have a look at the 'flatness' rating of your floor. If it meets the needs of the laminate then feel free to put down your new floor. Personally, I like to see 6mm cork underlay used over top of the old wood. This does two things. It helps "eat" 1mm or so of flooring deflection (taking it from 'not flat' to 'acceptably flat") and it offers noise reduction should the old floor continue to make noise. It is an added $0.90/sf but it is well worth the cost. Even the WORST $0.79/sf laminate over 6mm cork can feel like a dream floor. Just a little FYI for the DIY.

There maybe no expansion gaps between plywood panel to panel and perimeters. You have rubbing wood.