Perhaps. At least where I was, though, it was the cost factor. We liked Solaris better than Linux. But big Solaris Sparc servers (and every other RISC server too) were 6 figure purchases, with accompanying big support contracts. A high end 4 way x86-64 box was much lower initial cost, and much lower recurring cost. They did start lowering prices when they saw the shift, but too little, too late.