What good is to have 81 sys supported, if only Radeon 9800 or Radeon 1xxx can be pluged in?
At least they are usable. For real. IMHO, the GFX card situation is not a problem with MorphOS (the PPC is a far more serious issue for example); those graphic cards kind of match the computers general performance for which they were made anyway, they are of the same age, from the same era. The R200 support is rock solid, the R300 has had many updates and improvements during the last few MorphOS releases and is now probably (I have no personal experience) kind of mature, then there will be the R500...
The X1000 development/OS4 porting started in 2009, the Sam 460 was released (with OS4 ported) in mid-2010. PCI-e was touted as some kind of holy grail by some, and Radeon HD cards were bundled with the pre-built systems ever since then.
That was more than an entire "computer generation" ago, a very looong time has passed since then in "computer evolution time". And today I read in Trevor's blog that the first release of the Radeon HD driver v1.0 is closing in. The highlight of this will be 2D HW acceleration! Not 3D, not overlay, just regular 2D!
So to quote yourself: "what good is that"?
While we had 2D, 3D, overlay, etc...