my boss at the time refused to move to solaris from sunos (on his personal sparc, we moved to solaris at the company), it was my responsibility to deal with the solaris hosts from that point forward. we were definitely a sparc shop (though at the time we only had sun clones, no real sun sparc boxes).

I think it was mostly that he liked the bsd tooling over the at&t tooling, but it instilled so much in me that I still have a hard time remembering the gnu command line options: I tend to default to svr4, then to bsd, and finally to gnu. probably one of the reasons I still feel at home on macOS.