Actually DAZ does encourage content to be compatable in all versions of poser. All my products this year (since P6 came out) have included a P6 version. Daz just wants content to be able to work in versions as far back as P4 (which may seem a bit limiting....but they want to be able to reach as broad of a market as possible). The only thing they havnt done is accept things which can only be used in p5 or p6 (so far)