Oh yeh, let's wait another 3 years for Max3D and make it Vista only while we're at it.
Well firstly, what wait? Unless it supports either DX9 or DX10, I have no interest in it, so I'm not waiting for anything.
Ok, the first was a little facetious, so secondly, I didn't suggest it should be at the exclusion of anything else, so Vista-only wouldn't apply.
Thirdly, Mark himself says in his worklog that the engine is/will be written such that a DirectX renderer would be very little work. So if he says it won't take long, who am I to argue?