Every time I've seen this it's because of inefficient and wasteful use of 10/8 internally. Like, not every tiny site or thing needs a /24. Once the wasteful use becomes entrenched as a practice, it would be very labor intensive and time-consuming to go on a renumbering plan. As compared to the effort to just use 11/8.

And then ultimately because of refusal to get over the technical hurdle of using IPv6 for internal management.

Why don't they use IPv6? Is there still a lot of hardware out there that doesn't support it? It seems perfect if it's internal only.

Well I would hope it’s not Apple since they already own all of 17.0.0.0... one of only 7 private companies that own their own /8, as far as I know.