I do not think I have seen (or given) a demo in my entire life that wasn't "rigged" - prerecorded aspects, only showing extremely-well-tested areas, using multi

I do not think I have seen (or given) a demo in my entire life that wasn't "rigged" - prerecorded aspects, only showing extremely-well-tested areas, using multiple devices for the demo ...with the possible exception of the famous BSOD that happened while Gates as onstage back in the 90s