Personally I don't care, who brings us an X replacment be it (Wayland, Mer or ....). I don't particularly care if Gtk or EFL
are supported either as long at Qt and OpenGL with hardware acceleration via Nvidia's binary drivers are supported and working.
I only have 2 Gtk applications even installed on my system Gimp and Inkscape. And at the rate Krita is going it will be capable of replacing gimp or
the foundation will be completely laid for someone to come along and implement the proper capabilities into Krita to replace gimp.
Inkscape is an easy one to develop, and Qt supports everything needed and then some out of the box to develop a replacement. Doesn't have to support
svg, any open vector format will do.