If you look at DXOMARK camera scoring The Fold 7 is on par with your IP15 and just above your S24
The plastic inner screen protector that's factory fitted and protects the "Foldable Glass" is replaceable and those with Samsung insurance get it at a reduce price or free in some instances.
The dust ingress of particles less than 1mm is only related to the hinge area only, not the rest of the phone that is watertight. So unless you are literally shovelling in grit like Jerry Rig, its overblown IMO
I would guess if you only used the Fold 7 outer screen and did not multitask it would give your IP15 a good run for your money on battery endurance, as this would be more like for like
Given the price you can get the F7 with your dads discounts etc is probably less than its trade-in value next year, so makes it very attractive
You have tried Pixels before and there is no significant change to the OS that would overcome your previous objections
Stop dithering and trade in your S24