Which native framework?

Even in a "post-vibe code" era I wouldn't want to create multiple versions of the same app, and none of the "platform-native" GUI toolkits run on everything.

SwiftUI is apple-only, gtk has pretty bad compatibility on non-linux, qt is decent but requires C++ or python, and even so still not much for mobile. Don't even get started on "Windows frameworks", because as I write this sentence they may have left a new one in the ditch.

Flutter may be the closest, but why didn't they go with e.g. Java instead of a new language?

So yeah, if you want a truly universal UI then web is your best bet.

I never thought I'd defend Electron, but I'd rather use the bloated web UI than a vibe coded Qt/GTK version I'm positive will not have seen any human QA.

When I can modify my desktop/theme (KDE) with css I will happily start doing it since that sounds easy.

I have better things to do than spend my time adopting UI for various different systems. If Electron gives me the option to easily create a UI that looks the same everywhere, then I'll pick Electron over anything else any day.