I actually avoid using VSCode for a number of reasons, one of which is its performance. My performance issues with VSCode are I think not necessarily all related to the fact that it's an electron app, but probably some of them are.

In any case, what I personally find more problematic than just slowness is electron apps interacting weirdly with my Nvidia linux graphics drivers, in such a way that it causes the app to display nothing or display weird artifacts or crash with hard-to-debug error messages. It's possible that this is actually Nvidia's fault for having shitty drivers, I'm not sure; but in any case I definitely notice it more often with electron apps than native ones.

Anyway one of the things I hope that AI can do is make it easier for people to write apps that use the native graphics stack instead of electron.