You’d be surprised. I read about this s couple of years ago and when I got a new company iPhone 2 years ago I started doing the 80%. I’d charge it while chilling in th evenings and after a couple of weeks you just “know” when it hits 80%. Like when you set your alarm to 3:40am to catch that fucking 6am flight and you wake up at 3:38am
After two years my phone’s max capacity is at 95%+. No idea what it means, no idea if it matters but I did it and that’s that.
Perhaps, comically, it is the perfect representation of the world as it is now: “knowledge” in people’s brains is created by consuming whatever source aligns with the beliefs that they think are theirs. No source or facts are required. Only the interpretation matters.