I used to run vim and VS Code on a Core 2 Duo from 2005. Vim is a lot faster but VS Code is so much more powerful — it’s a full featured IDE. It’s not a quick and dirty text editor like Kate. It’s not meant to be that. I still use vim to edit config files but for everything else I use VS Code.
I’ve since upgraded to a 2014 i7 and now VS Code feels fast.