i used use UTC.  that was back when textures were mostly 2000 x 2000 and not 4000 x 4000.  i quickly took up a huge amount of space with duplicate textures.  and when i actually got back to working rather than playing with my new toy and converting textures, i never used it again.  not because i didn't use version 2 figures, because i did.    and not because i couldn't use it.  it just seemed like a lot of hassle to generate a lot of files and not even have thumbnails to know what i was doing when i went back to use the generated MAT files.  i'd rather just be able to stay in Poser, grab my figure, grab my skin and be good to go. 

but then, i also have WW1 and WW2, and i'd rather hand fit clothing at the moment.  because my modeling tool is now part of my workflow, and not having to break my workflow and learning a thing or two is worth the difference in time for me. 

everyone's workflow and work habits are different, and you have to go with what works for you.