The handling - the car understeers, every model I've driven (S, 3 and Y). I've not driven a X or truck (which I suspect have the same problem) or the Roadster (which I suspect doesn't since it's basically a Lotus with electric power train).
An slight over steering car is far easier to drive.
I thought these are inherent in electric cars (because of the heavy batteries) until I've driven a Polestar which is super nicely balanced - almost the best handling consumer car I've driven since the Baby Benz (yeah I'm that old), so it can be done.
Tesla is aware of the problem and they tried to fix it with torque vectoring in some variants.
Sure, they will go well on a long stretch of straight highway, which is what americans care about, but it's a different story in curvy european roads.
