It's also not truly declarative since you can observe ordering (and therefore your app may silently depend on imperative execution) There's also performance is

It's also not truly declarative since you can observe ordering (and therefore your app may silently depend on imperative execution) There's also performance issues with large amount of code, and last I checked, Qml doesn't really mix well with the traditional Qt widget and protocols (i.e. sometimes things are reimplemted in Qml under similar names, but with different behaviors)