What was cool about Solaris for old-timers? In particular, are there things that compare well against modern BSDs? My vague memories of it are that the userlan

What was cool about Solaris for old-timers? In particular, are there things that compare well against modern BSDs? My vague memories of it are that the userland showed signs of legacy (/usr/ucb), and I could never get the tools I needed installed. But that was a consequence of the setting I was working in, not Solaris. It would be particularly interesting to hear from fans of STREAMS or other kernel features.