Calling for a new openSUSE development model

I don't think it rules out Glib. Glib along with a significant amount of the GNOME platform(not things like GNOME Shell) including but not limited to GTK and Gstreamer maintain ABI compatibility for a long time. So does Qt et all.

When they do break it, they announce it widely and make both versions parallel installable which is really the best way to handle it unless you want to never ever break ABI compatibility which I think is a unreasonable expectation for anything higher up than say glibc.