It was quite obvious that there would be a 3.11 to fix whatever issues will somehow make it into 3.10.
Doing another "add new stuff" release (aka 3.12) for PPC is also quite obvious as so far no one has really seen anything on "4.0"/"MorphOSNG"/whatever.
I'd expect the 3.x line to continue for quite some time after the 1st outing of "4.0" maybe even past it's release.
