...what steps have Poser 13 taken to bring in users from you-know-where? Do we simply ditch all the existing content we have for The Other App (of which I have way more than a terabyte of)? 

Maybe I should ask this way: is there some sort of working path to import (or perhaps natively use?) existing Studio content that doesn't involve losing a multitude of features, or a non-convoluted process where hopes and prayers aren't required as part of that process?

Even with my income, $250 USD = a lot of ducats to gamble with as to whether or not an application will ease any transitions from competing content sources, at least to invite new (and in my case, old/former) users.

I think I know the answer, but I wanted to ask anyway, just for the record.

As for why I ask? Let's dispel some notions: I ask because It never hurts for a software house to keep their competition on its toes, and for us consumers, it never hurts to have options at hand.