I'm not intimately familiar with the Blender ecosystem, but I'd speculate that going with a homemade simulation engine instead of the one that comes with Blender didn't turn out to be a great decision in the long run. There's a lot of industry funding behind Blender development right now and surely anything to do with simulations would be a major focus. So anything one person can implement on their own, even if they're very good and experienced, will surely be surpassed before too long. As I said, pure speculation, but it seems plausible to me.

In Poser that's quite different, in part because (and again I'm speculating) there's just not as much developer power behind it and Bondware is going to have to be really careful on where to put its priorities. They might decide that dynamic clothes are the future and give cloth simulation a complete overhaul for the next version to make it super-easy and powerful for end users, or they may not.

-- I'm not mad at you, just Westphalian.