When I think of good Electron apps, the first name that pops to my mind is Visual Studio Code. They really did a lot of work to make the editor responsive and capable of sophisticated things without blowing your RAM/disk budget.

But it's still bloated compared to the editor I use, Emacs.

And it's still bloated compared to a Java-based IDE of equivalent functionality. (Eclipse and IntelliJ can do much more OOTB than VS Code can.)