ACC is simply a must-have for me right now. Battery degradation is massively limited if you don't charge over 80%, especially with the ridiculously unnecessary "ultra fast charging" most phones come with nowadays. And it is still plenty to last through the day.

A low tech approach is to put the charger in one of these mechanical timer switches.

That would constantly charge and discharge the battery – probably much worse than just keeping it at 100% continuously.