I really couldn't say. I guess what I can say is that I think steem is deeply underutilized. There's a billion dollar insight here, but it needs to be better supported with code, code, code and more code.
ANd that stuff isn't easy, of course.
Fabric, and the other fabrics like it that are coming into being, can change EVERYTHING-- in the sense of the blockchain community. I would love to see graphene pair up with TM chains natively, for example.
Anyway, I don't think fabric will get at the root of the "it's difficult to make apps round here" issue. Seriously it's like 10x the time investment.