I work for a small hotel chain, and have often joked about the tech stack if apple would run a hotel (with no legacy)... Time to see how it will actually look! (Although I guess they'll outsource the management to a hotel chain)
It also definitely had legacy IBM tech. This was before WiFi really took off and the guest rooms all had Token Ring. Which, as I recall, necessitated warning stickers all over the place because you'd fry your Ethernet if you tried to plug in. At some point, I think they redid it but then they offloaded the facility.