If your device has enough resources to power V8, modern GUIs are certainly very pleasant and snappier than a more minimal GUI like HN. Otherwise they are horrendous and very laggy.
QtQuick/QML/JS is very pleasant and I do wish more people would use it, but from I've seen it's 25-50% the resource use of electron, not some multi-order-of-maginute improvement, do I understand why many people still prefer electron for portability in this case.