An enterprising individual shot a video of “An experiment to see the effects of installing every major upgrade version of windows, in order, on the same machine.” All in 9 minutes, 49 seconds.
Of course, it took much, much longer to do that for each individual version at the time. But modern computers are so much faster than the ones at the time of the older Windows versions that they can be installed in a blink. If you still remember DOS commands, of course.
