> Microsoft, then a tiny fraction of what it is now, took $400 million from IBM in co-developing OS/2 and put the profit from that money into Windows 3.0
The timing didn't happen the way you're describing it. There are numerous accounts of the tale of how David Weise and Murray Sargent got Windows running properly in protected mode as an unauthorized, personal side-project.
https://news.microsoft.com/2000/09/10/i-found-a-cool-little-...