Oh right: Apple isn't constrained by their own license terms, so there's no reason they couldn't run Mac OS virtual machines at any scale on any hardware they wanted. Up to and including things that you would otherwise probably call "perfect Hackintosh" builds, since they can build actual Mac OS images with the hardware checks disabled, paravirtualization drivers, whatever.

When I worked as a contractor at Apple Retail Software Engineering, they bought for themselves the full final couple of shipments of thousands and thousands of the rack-mount Macs they had designed and built, and then ultimately killed. They filled a couple of data centers with them. And then they ran VMware on them so that they could have a lot more virtual Macs as servers.

They were also buying rack mount hardware from other vendors and running VMware on them, too. But I don’t remember what the vendors were that they were buying from. I doubt it would be Dell, given what Michael Dell said about Apple years ago, and the rivalry that has existed ever since. But I don’t know for sure.