We are far from fully functional but its working. No animation, no actions, no publish yet. Just design tools and the canvas area.
Also, the backend is completely new. We cannot open original persP projects yet, but since all of them were my projects it's not really a priority.
From now on, there is no need to save files, the system is always saving for you. We transmit only deltas. It's working great. It's being quite stable.