Hulk I don't think we're disagreeing on anything. I simply stated heat and voltage are the two main factors to battery decline.
Also you can have as many technical papers stating modern charge controllers manage temp just fine; but the heat generation (wasted energy) is not insignificant between charging speeds.
And to the "idle maintenance mode." That's great. In a perfect world. Where apps don't ever misbehave, and everyone realistically has the same use-case.
The reality is that the biggest factor any single person can change to maintain their battery life is their charging habits.
We do agree, its not 2005 anymore. You guys are so quick to point out faulty/low quality USB cables when flashing your OS.. But you link things that encourage people to blindly plug their phone into anything as long as it stays at 100% as much as possible wired to the wall.
It doesn't take a genius to notice the only time your phone is cool with a fast charger is >80% trickle charging. Why is that? I think the stated reason is.. Battery health? But who knows.
Safe. Smart. Simple. I believe when the average reader has to make a decision between filtering through decades worth of battery technology and storage evolution, let alone the improvements in li-ion technology itself.. They'll quickly choose 'keep it cool and not full' as the guideline.