You keep attributing some kind of unfounded malice to IBM.
VMWare released their first hypervisor for x86 in 1999. That's 30 years after the first IBM virtual machines. If you are asking: "why didn't IBM release a hypervisor for x86?" I would respond "why would you expect them to make a virtual machine on a platform that isn't theirs?"
This 30 years is also the same timeline for Intel to make their microprocessors OoO and superscalar. That didn't have anything to do with IBM keeping their technology locked up.
VMWare released their first hypervisor for x86 in 1999. That's 30 years after the first IBM virtual machines. If you are asking: "why didn't IBM release a hypervisor for x86?" I would respond "why would you expect them to make a virtual machine on a platform that isn't theirs?"
This 30 years is also the same timeline for Intel to make their microprocessors OoO and superscalar. That didn't have anything to do with IBM keeping their technology locked up.