> zones, dtrace, smf, iscsi and zfs were very well integrated together and lightyears beyond what was available in the Linux space at the time.

True, but did you need that? These are all high-end (therefore low-volume) server stuff. I loved that, and their high-end systems with dozens of SPARCs, but I had one customer who had one, and everyone in my company knew they made a terrible decision - they needed a web server, and you could do more with a rack of Dell boxes for a fraction of the Ultra Enterprise [very large number] price tag. They also decided they should run an enterprise application server (they went with Dynamo) instead of Tomcat, so, again, they made a stack (maybe a directed acyclic graph) of bad decisions. I think I facepalmed so much that is the point my hair started falling.