Hi there
A2k users with 040/060s are not going to trash their boards just to take a new GFX.
Just A z2, limited ok, will do fine for 2K users and 1200 with Zorro buses. And, hey, there are 3k and 4k users that are haveing problems to run Z3 cards since they dont have the latest revision of the custom chipset, so a Z2 will be viable for their too.
Think that making it Z2/Z3 would expand the available market for that cardin a GOOD amount of units sold.
Best Regards!
-FrankB