Just curious if they have something similar to USM or SW
16-35, 24-70, 70-200, 70-300, 70-400, and 300 2.8 all have SSM
Screw driven lenses are not inferior to SSM. The long focus throw makes them better for MF. On the A900, I can't see any difference in AF speed with SSM.
M262 ZM 25/2.8 35/1.4 50/2 85/2
SSM is quieter and uses perhaps slightly finer AF microsteps, but it adds quite a bit to the battery consumption of the camera. SSM is not always faster than screw driven, my 80-200HS-G screwdriven zoom is much faster than the 70-200 SSM for example.