You're making an assumption that I made assumptions.

I think mat changes should be done with mt5/mc6 files, rather than pose files, or alternative pp2 files.  MAT poses are another thing that confused me as a newbie, and as of P6 I think they are de rigueur.  I include mt5/mc6 files with my sets, but other people do use pp2 files for alternative mat versions.

I did not establish the protocol of using separate OBJs - though I do agree with the reasoning behind it.  The fact remains that some sites require even freebies to abide by this.

Changing materials is not the only reason for the stripped geometry;  it also allows for modular assembly of parts (various "preloads") without the file size penalty incurred by multiple copies of the same geometry.  Plus, it facilitates use of the model in other studios which may not be able to read the Poser pp2 file.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5