I will keep my 12 Pro Max I think, using it day to day it still feels the same as when I first got it in 2020! I've never experienced that with a phone before.
The changes expected with the 14 (and already implemented with the 13) aren't really that big a requirement for me, I would love the pro motion 120hz, but can't justify the money yet.
With rumours of the 15 next year coming with USB C, it also makes sense to wait and see if that becomes a reality, same for the telescope camera.
Will likely get a battery swap later this year though, mine is at 91% so could even wait longer.