It was the best editor I experienced ever. Thoughtfully designed coloring, simple but powerful built-in Git/GitHub client, the linter integration which was only shown when we needed it... After Microsoft cut off the development resources for Atom and it became unstable, I tried to migrate to VSCode many times, but I required several years to accept the UI degradation. I wish Microsoft chose Atom and only replaced Atom's text editor component with Monaco editor...
There are two Atom's successor, but Zed still has a critical bug for me (everything on the app is blurred), and Pulsar does not have maintained linter plugins, probably due to limited resources. I'm still looking for a better JavaScript/TypeScript editor...