Here's a good test: Do you want a text editor, or do you want something that's close to an IDE?

Atom/VS Code exist to be IDE-y, not as thought experiments on text editors in the browser. Their advantages are in the ease of developing extensions and tools that aren't part of the core package.

The difference is similar to Vim/Emacs. Of course Vim has some IDE-y plugins, but they're rarely as rich as what ends up getting built in Emacs.