Does it seem, a bit, like the "Golden Age" of Poser (including other similar software) passed quite a bit ago, before the technology even landed to make it as interesting as it could've been?

I liken it a bit to flight.  At first it was for Mavericks and innovaters.  Next, early adaptors.  Enthusiasts followed while the mavericks moved on and left the innovaters in charge. 

Soon the Enthusiasts became experts and the innovaters gave way to Industry.  Little has changed since, and you now have jet liners that are safe, fast, effective but those inside have very little comfort unless they shell out for first class, and I can find plenty of people who will tell you first class is anything but.