Yes, there was also a learning curve when Firefly was first released. I remember some people, including some vendors, refusing to use it, sticking with the Poser 4 renderer. Some textures just didn't work with Firefly.

And I remember a group at DAZ getting together to make Firefly MATs for popular characters as a community service of sorts. I volunteered, but I wasn't very good at it. I screwed up the first set I did and had to re-do it.