Quote Originally Posted by Nadirah View Post
And no, you can't just turn it off all the time. Some stuff requires coding lower end hardware just can't do.
What you're thinking of are new DirectX features or similiar. The only limitation for AA I can think of from the top of my head is that TXAA is Nvidia only. Even if there was one, they can just slap a DX11 only flag on it and it wouldn't affect your DX9 client in any way. No support lost.