There are many upsides.

One is my phone survives longer and whem I sell it second hand to a less fortunate person, they get a phone with a battery in perfect condition.

Another is that my phone holds more value.

Another is that I remove a worry from my head. I’m no longer questioning whether I am destroying my battery.

Though I don’t see the upside of charging to 100%. I literally dont need to. An 80% charge lasts me like 3 days so I usually charge every 2 days in case I need my phone.

Where’s the upside in this, unless you’re both planing to use same phone in e.g. 5 years and you might get ahead in battery capacity finally?

Not EVERYTHING is about having something better than someone else, jesus, I’m so tired of this mentality of “I gotta have just a little more than that other guy”. Why should I try to get more if I literally don’t need it?

Why would I want my phone to charge in 5 minutes if I spend 6-8 hours sleeping myself???

Why would I want to charge to 100% if 80% lasts me 3 damn days? (And that’s if I use my phone a decent amount)

If you need 100% charge daily by all means charge to 100% at full fast charging speed but I literally don’t need it.