Their dropping incomplete support for an obsolete technology - which is good. These guys have a great shortage of developers, and I think it's a good long-term solution for them to support the latest tech only.
I always thought, for example, that they are wrong in trying to reverse engineer the old NVIDIA cards, which will be obsolete and disappearing from the market soon anyway. They should concentrate on the present and future - say the 8xxx series and above, which are very different from everything before them, and little of what they've done on the older chips can be reused.
I hope I make some sense, it's very late.