@threat @rek2 depends on your target platforms. A lot of devs target Android and iOS too, and Qt has weak support for those. Especially for iOS.
I'd take Qt + Kirigami too, KDE people did a magnificent job of splitting their libraries into small reusable components that do not pull the entirety of Plasma desktop. Still, I understand the rationale behind using Electron even though I hate it.
It's actually stupidly funny that the most portable after Electron GUI framework out there is...
WAIT FOR IT!!!!
Winapi + MFC! Because Wine exists and works virtually everywhere, and this makes older Windows apps portable as fuck. Even if you consider L'Eunuchs world alone, you have much higher chances of successfully launching a winapi binary than anything in GTK.