That's because Blender rocks!

BTW, Clarkie, don't know if this will help but a while back I was in a similar situation.  I wanted to have a go at some clothes and was debating pretty much the same thing, conforming or dynamic.

In the end I settled on a trick, one that would give the real look of dynamic cloth but is actually conforming.  The idea is to create the clothes inside Poser in sections and then export them out and weld the parts together, sounds a bit weird but hear me out.

So let's say you wanted to make a dress for Roxie, you want to use Dynamic cloth but it's too tempramental and way too slow to give decent live feedback.  All you have to do is think about how a garment is sewn together from sections of cloth, pretty much like in Marvelous Designer, and do it bit by bit inside Poser using single dynamic sheets.

Lets say you took Roxie and wrapped a single dynamic sheet around her waist.  It's dead easy to handle because it's just a single sheet, but that single sheet forms the bottom part of the skirt.  Once you've simulated it by letting it drape, just export it as an obj and move onto the next section.  The next section overlaps the skirt so it would be the top half of the dress.  Again, let it drape and enjoy the speed due to the simplicity of a sheet.

Export that part as an obj as well.

So you build-up a collection of obj sections that have been converted to obj.  All you have to do now is join them together in Blender to make a single obj dress mesh.

It might sound crazy but it's a very powerful way to do it, because you have perfect control over each successive drape, one over the other, soft over soft or soft over hard.  The result is that when you connect it all up in Blender into a single dress mesh, you willl have proper folds and creases from the dynamics even though the dress is a static mesh you could use for a conforming dress.

At this point you might think, well, I suppose it would work but who wants to be using square sheet sections for each part of the dress?

You don't, you can knock out any shape sheet you want in Blender and import that into Poser to clothify it.  Basically, those cloth sections you see in Marvelous Designer can be made in Blender, subdivided, exported, and brought into Poser as "patterns" where all you need to do is clothify these pattern objects and drape them dead easy.

When you work with small sections like that, you enjoy it more because the simulation is much faster than trying to simulate a complete dress with holes cut out, and because the simulation is faster, it makes you want to play around more and tweak the cloth properties exactly as you want them.

It's a lot easier that way because you get much faster feedback, it's like you started feeding your computer some steroids!

Sounds crazy, but trust me, it works