These are all things that most phones already do, though. I think a realistic expectation of battery lifetime is needed here. Better allow for easier replacement in my opinion, the batteries themselves are not expensive (though we don't want to generate unnecessary waste, so, of course we try to make them last as long as feasible)

On a Phone, people are already conditioned to have their phone work all the time, no matter what you do to it, and there is an advertised Maximum Battery Capacity.

People don't do the 80/20 rule on Phones because that's outrageous to them.

But EV Manufacturers have built in the 80/20 rule into their cars. When you do long distance EV trips, the Route Planner will automatically tell you where the next charger that you will arrive at 20%-ish battery capacity will be and route you there. And the car will stop charging itself at 80% and you'll be ready to go.

Phones on the other hand, tell you "Hey moron, I'm at 30% you should charge me!" And most phones don't have a Battery Protection setting to cut charging at 80% (Samsung added this about a year ago to their phones)