Considering that Apple is moving away from Linux in the datacenter to its own devices, I'm not sure that's the case. The apple machines aren't available to the consumer (they're rack-mounted, dozens of chips per PCB board, custom-made machines) but they're much less power-hungry, just as fast (or more so), much cheaper for them to make rather than buy, and natively support their own ecosystem.

Some of the machine-designs that consumers are able to buy seem to have a marked resemblance to the feature-set that the datacenter people were clamouring for. Just saying...