This article (“Consulting the Oracle”) shows that you have clearly not understood what OpenSolaris was about. It was not a clean-room clone at all. It was the Solaris source code. Identical. Production-quality engineered Unix source code. Ideal for everyone working on any aspect of Solaris, not just programmers or developers. OpenSolaris wasn’t Unix-like. It was Unix. And it was a showcase and test bed for new technologies coming in Solaris, essentially providing the best of both worlds: freedom in the FOSS sense, and solid dependency of a commercially engineered OS.
Volker A. Brandt