It's been a viable technology ever since IBM started doing it in the 1960s, with VM. Oh, wait. This isn't VM. This is something less-featureful than VM which w

It's been a viable technology ever since IBM started doing it in the 1960s, with VM. Oh, wait. This isn't VM. This is something less-featureful than VM which will, possibly, eventually evolve into VM after a lot of hair-pulling. My mistake.