Honestly I've been a member @ Rendo since 2004 and the Daz Forums have always been a bit of quiet here. It's not really a new thing. Also It's not the primary forum for DS users and never really was. Honestly I post here less than I used to as at times I have felt the wrath of moderators who feel that anything other than a passing comment is an "Argument". There are also a core group in some parts of the forum who have strong beliefs in particular tools purity and feel the need to stand on anyone's fingers who dares to bring any counter points to a discussion or even suggestions for future development. TBH it just got old for me, I do stop by from time to time and see the same antagonists having the same arguments from 2015.

In the past I have ran private competitions, posted relevant Daz update threads, vendored at the storefront here, offered help to users and have even been asked to moderate this forum. But over the years I have noticed the threads that see the most attention tend to be contentious ones with a small vocal crowd shouting down any 'unwelcome' ideas.

Poser is currently in some kind of years old content crisis, despite regular updates, as the vendors jumped ship/platform years ago when Poser content sales numbers floundered. Primarily due to a lack of a modern base figure and development tools. I believe the cry in the day was something like "Genesis we don't need Genesis, Poser is a creation tool not a content platform!" and I guess those loud voices got what they asked for... Leading to the current situation where a DS content importer is just not worth the investment time for Daz 3D and the Poser faithful will not even entertain the idea of a Renderosity developed importer. Poser is also selling at a base price of $250 USD which is creating a blockage to growing the user base in comparison to other software suites. And despite the storefronts appearance these are primarily Poser forums. (Check the best selling items page it is and has been consistently for years over 90% DS products. But on the back end the support for a DS crowd has always been minimal and an afterthought).

Another factor to consider is the growth of platforms like Discord over the old style forum setup. These often provide a less curated 3rd party environment for discussion with more diverse mixing of users. As far as I know there are no Poser or Renderosity Discord forums, official or otherwise.

So I would say it is a combination of the shrinkage of the Poser user base, competing technology platforms and diversity of forum environments are the main factors at play. But what would I know. ;)

Just to give you an idea. Here is a ten year old thread regarding Renderosity's support for DS: https://www.renderosity.com/forums/threads/2877803/daz-studio-gallery-question