How hard is it to port X/Gtk/Qt apps to PicoGUI?
Well, PicoGUI isn’t designed to be easy to port software to, it’s designed to be a completely new GUI architecture. In general it would be very difficult to port a Gtk app, for example, to PicoGUI. However there are of course exceptions. If the app has a good separation of it’s GUI code it might be easy to port. X-Chat is a good example of a Gtk app that was ported to PicoGUI because the GUI was well-separated.