For doing serious UX work, having direct manipulation of the GUI is paramount. Modeling human cognition without actually seeing the design while designing is makes hard to actually do the core of the work. Qt creator/designer for Qt desktop/widgets shines here.

Designing UIs in text is where most frameworks fail. It seems really bizarre that more techie devs still seem to believe they can design good UI blindfolded.

Imho, C++ not is a language using which user facing software should be built anymore, but Qt at least makes the compromise bearable, making memory management less of a burden.