I don't believe a replaceable battery needs to make a phone any thicker or heavier. Just take anything that's glued now and secure it with machine screws instea

I don't believe a replaceable battery needs to make a phone any thicker or heavier. Just take anything that's glued now and secure it with machine screws instead. "Replaceable battery" isn't the same as "swappable in the field with no tools", and while that's nice to have, it's not necessary in order to forestall device obsolescence.