But even having data for 2 years isnt very useful. If you replace your phone after 2 years then there is no need to care about battery life at all.
When I was younger my mother would scold me for needing a replacement phone every 2 or 3 years because of how much they cost. Aside from gaming I was also working on schoolwork or reading stuff on my phone because I had no computer, and I often charged my phone to 100% while doing those things causing it to overheat and charged it by 20% so that wasn’t doing wonders for its lifespan. Man if only I knew. So it grinds my gears when I see someone dismiss battery lifespan concerns by assuming you’ll want to buy a new phone in 2 years. My mother’s phone has been with her for upwards of 5 years and she’s perfectly content with it. And because I invest my time in only one game (the same one for years) there is no need for performance upgrades. So what’s the point of buying a new phone every two years?
And if it can run a 6 hours with 60% then I would like to preserve its ability to hold on for an entire day at 90% if the situation demands it. I often deal with this at school. A half day of back-to-back classes? 40% is game. But a schedule that has more than a 6 hour gap that I’d likely fill with studying from PDFs and gaming? Then a good 90% is needed.