Re: terminology - I was using 'Junk' as a collective term....
Yes, it was rather crasp and somewhat illogical, I'm not sure anyone in their right mind would go out and buy a 'shed', ....potentially costing more than a house...., to store sentimental household ornaments.
Having never worked on a mainframe and far from being a mainframe expert, I'm struggling with your 'shorthand, my understanding is that you get a choice of either LPAR, zVM or KVM, which can also co-exist side-by-side on the same platform.
When did Vendor lock-in become a dysphemism for consolidating high-volume OLTP and OLAP mission critical linux workloads on the most reliable, most secure and most performant commercially available platform in the world?
Astonishingly, it's the one platform the majority of technical folk don't quite get, what leading business folk do, which is probably the reason why it has been around for 50-years+.