Now available is Decimator for DAZ Studio for DAZ Studio “4.5.0.114 or higher”.
I bought this a few years ago as part of the set of Game Developer Kit suite of plugins for DAZ Studio 3, to get DAZ content to iClone. I used it a lot and it’s excellent, and does the job: reducing huge 3d meshes down to a much lower number of polygons. It’s very flexible and easy to use (once you find how to launch it in the menus), and its great to see it being kept updated to work with the latest versions of DAZ Studio.