The people who own the 1% of all Macs ever made that are supported you mean?
It is more than enouhg. There is probably a few million Mac computers which are MorphOS compatible.
For x86 you will need to spend 1000s of man hours going from PPC to x86.....then send 1000s more creating drivers for a fraction of the 1 million component combinations still in use that equal the x86 'standard'.
Why? You can limit your support to certain brand of computers.
That's the problem....x86 being a standard is an illusion and the Windows registry file he duct tape holding it together[badly].
PPC is the standard then? Oh right, it is so standard that MorphOS boots even on ACube hardware :-)