I think JoePublic eloquently expresses a point of view, passionately expresses that point of view. Hatefully expresses that point of view? Not so much.

When we were putting together Wardrobe Wizard we were faced with what to do about adjusting joint parameters. I knew there was no one size fits all. I knew it would be an issue that may "scare" off potential customers, however my gut feeling was that Poser folks are not babies. Much of the joy of working in 3D is that it is not easy so the sense of accomplishment when learning a new skill is all the more sweet. I put out tutorials, videos. I answer email questions and forum posts. Provided people are clearly taught it is clear to me that they enjoy to learn. Judging by the sales figures I feel I was right. I get emails like, "Thanks for explaining it to me, was not that difficult after all."

I get similar questions from DAZ Studio folks. Unfortunately all I can say to them is either wait until you can purchase that plugin for your free Poser file viewer or buy Poser.

To answer the original question of which application jetstream should go with, best to decide what you want the application to be used for. If you just want to view and pose your Poser files and enjoy a good render engine then stick with your freebie. If on the other hand you want to take your 3D creativity into avenues that DAZ Studio does not cater for then consider purchasing Poser.