It seems like you and parent are asking "What is the boring/productive stack for *cross-platform* desktop apps?" And the answer to that question is probably, as you say, something like Electron.

If you pick an OS, I think there are generally good answers. In Windows, it's .NET and C# with Visual Studio as your IDE. On OSX, it's Swift/ObjectiveC and AppKit, with XCode as your IDE. For Linux? idk, is it the year of the Linux desktop yet?