Not sure what you are referring to here. The benefit of Qt for me is that it wraps more APIs on more OS's than anything else I have come across. You can run your app on Qnx even Windows CE. It's incredible. You write your view in QML and logic in C++ with libraries that are so much saner than e.g. Boost. Then communicate between the two with signals and slots which integrate seamlessly with the dataflow property system. It couldn't be neater from my point of view and I have used a lot of gui frameworks.
I like Qt, especially the desktop part. I haven't used QML at all, but started using Flutter. Killer feature in Flutter is sub-second update times preserving the same state app was running as before. Is this doable with QML?
(Juce, a C++ ui framework, has also been a contender, and to a degree Lispworks, possibly others, but these are the ones I'm a bit familiar).
