As much as I wanted to like and use VS Code, Electron base still ruined it for me. If it was some other app where I do not expect instant snappiness and lower memory usage, for example, Slack (also Electron app), I would swallow it, but for an editor, I can`t.
How much memory does it use? My emacs instance uses ~200M with a moderate amount of files(along with other processes mostly repls). I would imagine VSCode to be in the same ballpark, and 200M is not that of a big deal imo.
Here is a hint of performance
https://blog.xinhong.me/post/sublime-text-vs-vscode-vs-atom-...
But an even better test is when using these editors on large projects with hundreds or thousands of files. Atom is a disaster. I tried to like VSCode and except Electron part and baggage it is great.
For this reason, I am switching to vim for everything except Java/Kotlin. There is nothing even remotely close to IntelliJ for Java or Kotlin and you can use very nice vim bindings in IntelliJ. I also keep Sublime installed for quick file edits when browsing the filesystem with GUI apps.