I understand what your saying and I'm with you, but if we are talking the same resolution, what is it that you are trying to accomplish. Do you feel that the pod's cabs and mic's leave some thing to be desired? Or are you looking for more options?
I think variety is extremely important as it increases the odds of finding that speaker that matches perfectly to each players individual setup. There are many types of guitar bodies, necks, wood, pickups and other hardware combinations that many times a patch that sounds amazing on some strat sounds completely different on another strat . It's very noticeable not only with POD HD, but with most modelers. In the real world, that's the advantage of buying a head instead of a combo amp, if you ever auditioned different cabinets for the same Head, when you find the right cabinet, the difference is sometimes astonishing.