I can't remember a phone that died because of the battery since the era of Ni-Cd cells in early cell phones. I don't think I've never discarded a phone with a li-ion battery because of the battery. It's always physical breakage or getting too slow to be usable, because of age.
Sure, I don't spend a cycle per day. Not even every other day. That's probably rare, I get that. But much rather than because of dying batteries I'd like EU to mandate
- the phone should come with full keys so that I can own the machine if I want to - or at the very least the hardware must become unlockable once the support period ends - individual components should be made available for independent repairs - repairs must not need software pairing of hardware components on unlocked devices
because of right to own and right to repair which shouldn't be "rights" but nonnegotiable traits of physical properties like they used to be.