..and the simulation you missed out is Flight Simulator - Microsoft has been working on a major improvement over anything that existed before it, likely coming out next year. Its about 2 Pb (2,000,000 Gb) in size but rather than installing it you allocate a portion of a disc drive and it streams the terrain as required. Saw a youtube video about it last week and they mentioned a "home cockpit", a term I'd never heard before. (I have virtually no interest in flight simulators, messed around with one about 20 years ago and that's as far as it got).