> Every time I do a shoot-out of Electron alternatives Electron wins and it is not even close
Only if you're ok with giving your users a badly performing application. If you actually care about the user experience, then Electron loses and it's not even close.
Name something specific. Note for two x-platform UI toolkits I have some familiarity with:
Python + tkinter == about the same size as electron
Java + JavaFX == about the same size as electron
Sure there are people who write little applets for software developers that are 20k Win32 applications still but that is really out of the mainstream.