my favorite IDE was at one point Komodo, the "scintilla editor widget married to the old Firefox XUL runtime". It really worked well - since the editor was a native component, you had speed and performance that Atom et al couldn't handle.
It died when Mozilla ended XUL, obvs. The lead dev made a short effort to "port" it to Electron but it went nowhere.
I think I'd love to try to bring it back. I think it could work.

