Nobody is willing to make a phone that sacrifices battery capacity for lifespan (by limiting charge to the 20-90% range)

My Asus Zenfone 3(?) hand this implemented as a settings option.

Also this whole battery problem could be solved by selling new batteries, even those new squishy ones. My friend got a battery for his four year old phone changed at a repair shop but it ended up barely any better than his old battery. It's always the case for some reason...