[saiya-jin]

I know there are plenty here who agree with you, but for at least 98% of the population its just a crappy old technology by company who is charging too much over it. They don't understand technical details and they don't care. A phone who can charge in 30 mins vs 2 hours is a major selling point though.

Most people change phones every 3-4 years due to many reasons, physical attrition of hardware being one of it, battery being another, overall hardware not being good enough (speed, capacity) being another.

Almost nobody cares if they can save 5% of battery over that time by charging slowly. Heck, I know I don't. It would be a different proposition if one would lose say 50% of capacity, but even folks in this thread confirm that's not the case for same hardware.