Plug-in architecture is a highly beneficial thing that all higher-end CG apps generally have... and Poser definitely should have, to remain a healthy app.

Poser certainly ships with a number of very useful plug-ins, which can optionally extend it for advanced or specialist purposes... e.g. the advanced render options.

I would guess that whether a more widely used plug in is bundled or not, will be down to whether or not a deal can be struck between SM and the 3rd party plug-in developer?

Wardrobe Wizard obviously has been bundled in this way. I wouldn't be surprised to see a certain other script, that is now being more widely used in P9/PP2012 and up...end up being bundled also... depending on how the author of that wishes to proceed...

However, it's not surprising, I don't reckon, that a more sophisticated plug-in... for a more specialist purpose... such as PoserPhysics is kept separate (certainly at present). Especially given it's retail value, when it is sold separately.

Soft body physics is a big old beast of a thing to tackle though, far as I understand it... and may well be beyond what's possible with a plug-in... currently?

Presumably, to do it right, would mean some sort of integration with weight maps... and who knows what else? So personally, I'd expect to be waiting a little longer to see it... beyond maybe techniques which are more, effectively, workarounds or tricks, in the meantime.

Workarounds, tricks... or whatever... techniques, are fine by me just now though. Indeed, because I'm not currently making animation, I'd generally prefer to go the morph brush route.

The discussion of cloth room techniques is fascinating though... and I'll need to give it a try somepoint soon...