Actually while that is certainly a huge issue as well, it’s all about energy density where batteries fail the most. I really get the feeling that if you try to increase energy density too much in a battery, you’ll end up with a fire as you will have way to much of an energy slope for a nice slow battery reaction.
If it only takes 5-10 minutes to recharge AND if the range was just reasonable I’d be happy. Even if it only went 100 miles I’d be OK with that if recharge was 10 minutes.