1.) Port it to Electron and keep nearly the same code base

2.) Rewrite the whole thing as a native app in such a language as C++ without the use of Electron

You can't possibly tell me that most developers won't choose #1 instead of #2 in a heartbeat (the switching costs are orders of magnitude more for #2, for one thing). Which is not a Good Thing.

And it's also very obvious that #2 isn't nearly as secure as #1, which runs in a sandbox and so does not have direct unchecked access to users' files like #2 does.