I happened upon this article and wondered if anyone could ever overcome all of the issues and build such a system. https://www.techrepublic.com/blog/classics-rock/windows-31-experiment-hits-a-wall/
Well, I just did, and then some. I set out out to build a single physical machine that can run everything from DOS all the way through modern Windows, with full function for each operating system. The goal was to build a multi-boot wonder, one that didn’t need to swap out hardware components between booting-up each OS. This is ostensibly a first-ever:unless someone can show proof they’ve been able to overcome an array of very complex challenges. Details here on PartsPicker: https://pcpartpicker.com/b/yJjcCJ