Quote - You're making an assumption that I made assumptions.

no, i didn't. 

Quote - For the new folks, the reason for this is that a stripped pp2 can be re-textured by a third party texture artist and offered without violating copyright because they are not re-distributing the geometry OBJ.

that statement assumes that you need a stripped pp2 to be "re-textured by a third party texture artist and offered without violating copyright."  that isn't true.  it would help people misuse prop presets.  that's not a good thing.  the more users have to look multiple places for material presets, the less usable content is.

and if by "new folks" you mean "new texture artists," then you're assuming that's the easiest way for them to make material presets.  that's just not true, as far as can tell.

Quote - I include mt5/mc6 files with my sets, but other people do use pp2 files for alternative mat versions.

based on my runtimes, i'd say the number who do are relatively tiny.  i've been cleaning gigs and gigs of folders in the past month or so.  i've just made it to my "scene" runtime.  so i've gone through quite literally hundreds of props in my various props folders.  the only props i've organized so far that use this method come from the DAZ PC.  and even then, not most of them.  as far as i can tell, mainly LaurieS distributes her MATs this way.

Pose files for MAT Poses have been the norm since way before P6.  they've been the norm since i started using Poser.  when i started collecting, there was older content by a few that used Camera presets (i think only Fyrene), but that was it.  none of the older files i've encountered so far use the multiple prop method.

Quote - Changing materials is not the only reason for the stripped geometry;

  
which is why i said it would be nice to have an easy way to do it.