Xeon Phi processors are not only rather expensive, but pretty slow in ordinary single-thread integer work, since even the highest model tops out at paltry 1700MHz. The lack of out-of-order execution widens the performance gap even more.
CPU speed isn't critical in file/print serving and such, but when the higher powers want to crunch data in their BI software set, then the CPU is a bottleneck for the next hour or so. (which may be due to bad software since it doesn't do parallel things)
Biting the hand that feeds IT
