[andechs]

If you have higher capacity batteries, you're carrying around extra weight you're not using.

The long range model 3 has a 480kg battery. Unless there's a massive revolutionary discovery in battery technology, for 10 times the range, you're going to need to carry (and accelerate) 10 times more mass every time you stop and go.

[N1H1L]

I am a massive BEV fanboy - but I don't see 5000 mile EVs happening anytime soon, if ever. The current energy densities are already ~200 Wh/kg. We can go max to 700Wh/kg. So at most we will have 1000 - 1500 miles of range.

These are pretty hard physical constraints that no amount of research will solve.