Both MorphOS 2D&3D drivers are far more stable than AROS ones. And also include overlay.
IMHO it's better to support few hardware pieces very well than supporting a wide range of hardware with less features than the hardware we used to have (PicassoIV/Cybervision3D already had Overlay 15 years ago)
I prefer having excellent support for a few ATI cards than supporting incompletely many brands&models.
BTW, good job, I'm happy for AROS users.
I'd like to know exactly how you can say MOS drivers are "fare more stable" than AROS ones just by adding that the latter don't support overlay (yet). MOS drivers may be more optimized due to the fact their development started far before the ones currently used by AROS, and that they are focalized on a lesser number of GPUS but... well, the world has a little changed in the meanwhile.
In the GPU market a graphic adapter gets old after 6 months and obsolete in 3-4 years. R200 cards (Radeon 7500/9200 and derivated) are now more than 10 years old, and dramatically less performant and feature-wise than current ones. You can't even compare their respective complexity. Short times between hardware refreshes means also a short time window for driver development, and common PC users are now expected to upgrade their video cards from time to time (generally speaking, every 24-30 months or so). How can you pretend to live with 10-years old sw/hw technologies forever in a similar market?
Gallium drivers might not be as optimized and fast like native ones (on the same platform), or like MOS R700 drivers in general, but they support far better and far more interesting technologies. The Nouveau driver might not support overlay at this stage (however, it's not only Nouveau culp), but Gallium supports shading language and as someone pointed before, it can be used to wrap Warp3D/Wazp3D functions over MESA, and hardware-accelerate all the applications using it on far more modern graphic cards.
I feel this a little more interesing than overlay, not counting that overlay is coming in the future, at least according to Nikolaos' efforts.