system
A chat on subreddit /r/wallstreetbets
human
The theoretical energy density of Li-ion is like x3 of its current energy density. They will get there with time.

gpt
3x modern lithium ion energy density is still like one-eighth the energy density of a tin can with gasoline in it.  'rechargeable EV batteries in parity with internal combustion engine energy density' is star trek shit.  those batteries would be a greater technological leap than an alexa skill that lets you mine asteroids by voice command.