I 'evolved' over time (not unlike our species) from Poser to Daz and took all my items, scenes and characters with me. Daz will open Poser formatted stuff and you can save it in Daz's format. Characters will look a bit different and of course, you'll need to fiddle with materials. I still use the traditional library setup since, like you, If found that Daz's smart content isn't. My Poser runtimes have been carefully managed over many years of use and I find that I can find stuff quickly in them.