If those programs have to re-group then the morphs have to projected in some way, even matching point-to-point because now all the groups are different, changing vertice count per group and vertex orders.

We wouldn't be able to re-distribute clothing that we didn't make in the first place, regardless of how the morphs get in there or even redistribute the morphs because all of that, via a tool or not, is using someone's else' work to produce something.

But yeah, sure, for your own personal, non-distributed usage, converting anything you like is completely fine.

Is that what we are talking about?  Just not sure where this is all going as a final result ;)

.