"How long will content development need to worry about being 100% compatible with P4 standard?" I think only CL/eF can answer that one, how long will they be selling Poser Artist. Don't foreget Daz has not embraced P5 well, not to mention P6. DS is more of a P4 type app, untill they start selling the add on packages, I'm sure will happen eventually. "What I'm trying to say is, there are some obvious disadvantages to the majority of P5/6 (and eventually P7) users by continuing to create "bloated" content that was designed for an application that's at least 4 years outdated now." I can't add anything to that. I completely agree. Modeling so much of my own stuff now that I have learned where to cut corners and still have a very well made model that works well in P5/6.