Or, perhaps it's because Solaris doesn't matter to anyone anymore.
I just spent a week, or so, updating our installer for Solaris, which is the first time I've spent any time on Solaris in a long while. I was surprised by how far behind everything is, and how difficult it is to find people actually doing things with Solaris, anymore.
The CSW and spec-files-extra, repositories are all but unmaintained and have been for years, and thus includes packages that are insecure by default. Sun Freeware is now a commercial service, that is expensive enough for me to assume they only have a few hundred users (tops). Installing anything beyond a bare bones AMP stack is an exercise in frustration unlike anything I've ever seen (and I've been messing with UNIX and Linux systems for 20+ years).
Solaris 11 currently has outdated everything. The Open Source community that had sprung up around Solaris during the early OpenSolaris years has fled to Illumos-based distributions (or to Linux or the BSDs, I guess; they certainly aren't working on Solaris, anymore), none of which have the resources to even compete with a modern Linux or even the BSDs in terms of number of people working on making it nice, modern, and easy to deploy.
In short, Solaris is a wasteland. Oracle seems to just be milking the remaining corporate users until the cash cow falls over dead.