From memory there was LPAR "Logical Partitions" - which were effectively like a VM.
and there was WPAR "Workload Partitions" - which had a shared OS and were more like a container.
I had some "interesting" experiences getting stuff to work on WPAR's.
I'll echo this for anyone else in the comments -- You can watch the cricket episode with 0 knowledge of the show and 0 knowledge of cricket. If you haven't ever seen Bluey - it's a great example as to why so many speak so highly of it. If you haven't seen bluey but want to see what the fuss is (and especially if you have any interest in sports) -- it's only 7 minutes long and absolutely worth watching.
I'm not sure how true that first statement is anymore. Most of the recommendations I see now are "just get a Bambu labs one". We are much closer to 3D printing as a utility as opposed to 3D printing as a hobby than we were ~3 years ago.
Fun thing with payphones - at least in Australia -- Telstra is investing in upgrading them (at least the ones in the cities). They aren't very useful as phones - but they are incredibly well situated billboards that you can plaster ads on top of.
For a point of reference -- LTO5 pushes data at up to 140 megabytes per second.
(But Tape has the same problem -- Capacity increases faster than speed)
I had some "interesting" experiences getting stuff to work on WPAR's.