I don't know that Poser would survive if DAZ figure support goes away.  It could, and should, but the masses would migrate over to DS.  The problem is marketing.  DAZ are masters at it.  No matter how good a figure is that is not DAZ, it won't do exceptionally well because it doesn't have the DAZ name attached.  Part of that is that people figure if it is a DAZ figure, there will be support of it in the future.

There have been very good figures that weren't DAZ in the past.  Where are they now?

This is just my opinion, for what it's worth.