I don't know how subD's handle dynamics (cloth, hair, etc).

 

It's been a while since I worked with subDs, but from memory, I don't think subDs can create flat planes. I could be wrong on this. But if that's (still?) the case, then polys would still have to be used to create dynamic cloth, which needs triangulation to really work well.

 

Kind'a just thinking out loud. If I get bored enough I'll research it.

 

~Shane