That said, I personally don't have a huge issue with Electron apps on face value - some of them (VSCode, for example) seem to outperform their native counterparts quite handily (in this case, VS - install time, upgrade time, cold start time, warm start time, actual usage). That tells me that the implementation choices affect performance as much as the underlying technology.
Electron apps might beat other electron apps (VSCode over Atom), but we're still a long sight off from electron apps beating compiled ones in most cases.
None of your alternatives have built in JavaScript debugging or multiple projects per workspace.
Debugging: Fair enough. VSCode is starting to stray toward IDE, which the others described specifically exclude. They focus on the text editing and leave the debugging for other specialized programs. VSCode would make sense to be an IDE since it's coming from a Visual Studio lineage though.
Multiple Projects per Workspace: Sublime has this as a project can have any number of folders added to it. A sublime project is equivalent to a VSCode Workspace unless I'm missing a nuance somewhere. Vim and Emacs are less useful in this regard, though they have project management plugins. Most of the time, Vim and Emacs will just save off a workspace in what they call a "session". You can load the session and be exactly where you left off (down to the cursor position). These can also be configured to happen on startup/shutdown.