It certainly was a thing in the 80s, IBM was selling it in the late 60s. [0] I don't know how difficult it would have been to put in an airframe though... I'm

It certainly was a thing in the 80s, IBM was selling it in the late 60s. [0] I don't know how difficult it would have been to put in an airframe though... I'm guessing: very. [0] https://en.wikipedia.org/wiki/Virtual_machines#History https://en.wikipedia.org/wiki/Virtual_machines#History