The more things change in IT, the more they remain the same
The Solaris vs Linux today looks very much like the OS2 vs Windows issue when OS2 was new. One is vastly better on very high end equipment with better features but the alternates are better running on generic machines. I use ZFS on both Solaris and FreeBSD and the Solaris version has more features and seems to be better optimized. I would love to have some of the new SPARC hardware but the base model cost more than a new car and my work load just doesn't require that much power.