I wished Qt just split into a different widget set for mobile. The interaction behavior is significantly different that attempting to reuse the same UI for both mobile and desktop will result in a terrible experience on both.
Likewise, QML is just plainly useless on the desktop, and much slower to booth. Unfortunately, the performance regression in Qt5 is there also if you don't use it, and that shouldn't be.
Qt5 being slower than Qt4 is the main reason I've been moving slowly towards copperspice (http://www.copperspice.com/) for newer projects. The fact that moc is no longer necessary removes also the main paint point of qt.
Likewise, QML is just plainly useless on the desktop, and much slower to booth. Unfortunately, the performance regression in Qt5 is there also if you don't use it, and that shouldn't be.
Qt5 being slower than Qt4 is the main reason I've been moving slowly towards copperspice (http://www.copperspice.com/) for newer projects. The fact that moc is no longer necessary removes also the main paint point of qt.