I used Atom for a while, and I recall regular instances of the entire IDE freezing for 10+ seconds for no good reason when I had a few files open. At the time (and to some extend even today), everyone just chalked this up to "Electron is terrible". But MS came along with VSCode to show how a lot of the "issues" with Electron were actually just issues surrounding bad code / software design that were bogging down apps.

Like you, I felt a bit sad to switch from Atom, but the difference in quality was massive. I guess that's the difference between having a bunch of smart people who have developed enterprise software for a while working on an Electron App, vs. younger, equally smart folks working on an app without that wealth of experience to draw on for developing a complex application.