To be honest, this isn't a major surprise.  The Poser community has some hefty expectations when it comes to compatibility for content.  It's like, it's designed for Poser, but has to work in Poser, DS, Vue, Carrarra, and Bryce.  It's also got to work with every version of those programs.  And....frankly, that's just not realistic.
Kudos to them for announcing it.  They're being honest.

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Knowledge is knowing a tomato is a fruit. Wisdom is not putting it into a fruit salad.