I gave up on Atom when it was released because it was the most slow editor I have ever seen.
It single handy bias me against Electron app until I discover VSCode.
Slow or no slow, I couldn't understand how it works. Windows kept opening wherever one least expected it, i got multiple copies of tabs with some introductory help text when i just wanted to get back to my project etc.
For once, I'm not going to complain that something is made in Electron :) It was unusable to me in other ways too.