As today, AGL mostly leverages Wayland IVI-shell as inherited from Genivi. Worse than having technical limitations, the main issue of IVI-Shell is the persistent lack of interest from the Wayland community. As a result, the IVI-shell ailed to gain adoption from any generic software like browsers or well known social/media applications. Since the early days of Wayland, new options appear to better support compositors/wm.
On one hand, Gnome and KDE ship their own flavour of compositor/wm; nevertheless those solutions remain too monolithic and too desktop centric for the embedded world.
On the other hand Wlroots was designed upfront, not as a Wayland compositor/wm but as a foundation to create compositor. Furthermore, because it’s more recent, the authors were able to leverage the lesson learnt from older toolkit as Weston or WLC and created a far more advanced and flexible toolkit.
Download Slides [here]
Demo video [here]