Aww... all the good jokes are taken...

Well, might as well make an on-topic post. First time for everything, I s'pose.

I think it's largely an issue of creative people being the sorts to need to seek out new challenges. When a new figure comes along, the texture, prop, and clothing makers jump on to it, leaving them less time for the older figures they've done work on already.

Another likely possibility is that people who do it for income see accessories for older figures as having diminishing sales. I don't imagine they sell a lot of dresses for Victoria 2 here, for example.

After that, it kind of becomes self-perpetuating... people buy the new figures to take advantage of the new stuff, they get the new stuff and ignore the old stuff, people make more of the new stuff to take advantage of the shift in the market, and it goes 'round and 'round.