(Distros that are not Arch usually set up one of these solutions out of the box).
It works very well for traditional QWidget/GTK style desktop apps. However, with both QtQuick/QML apps and modern Gnome apps, they have more divergent paradigms and particularly the QML apps tend to be less consistent with each other, never mind other UI toolkits, for much of the same reason webapps also are.
(Distros that are not Arch usually set up one of these solutions out of the box).
It works very well for traditional QWidget/GTK style desktop apps. However, with both QtQuick/QML apps and modern Gnome apps, they have more divergent paradigms and particularly the QML apps tend to be less consistent with each other, never mind other UI toolkits, for much of the same reason webapps also are.