Re: But ...
> The OS that MS morphed into NT3.1 (there was no NT1.x or NT 2.x)
The first NT was numbered 3.1 because it had the Win 3.1 GUI.
NT was a completely new development by Cutler based on the planned successor of VMS. It had no relationship to OS/2 except NT ran an OS/2 1.3 personality. Microsoft paid DEC $100million for stealing their ideas.
You appear to have the mistaken idea that OS/2 1.x and 2.x led to NT 3.x. There is no basis for that idea.