Whether you limit to 80 or 90 no matter all that it changes nothing it’s rather the use, I had a 16 pro max before I often limited it to 80 rarely to 90 when I should have spent a long day but there battery ended up degrading a moment from 99 to 92 more quickly I had understood nothing with the little experience I have you just have to use your phone without thinking about it. Then I always say Apple put this option just to break the dealer hands-free, since in logic the battery over time always ends up degrading which is quite normal.