SPARC with Solaris is pretty inferior to Linux on x86 for many purposes, including the entire web-stack. This competition forced Sun to innovate, giving us the UltraSPARC T1 and T2, which is simply amazing technology. Suns UNIX innovation (i.e. Solaris 10 with dtrace and ZFS) came as a response to the success of Linux, not in spite of it.

Sun paused to sleep on their .com laurels, and it killed them.