I upvoted it becaue of your effort to create a logical argument. I am glad you ended the way you did - ack'ing the reality.
Amiga as a company was stuck in the 80s. You think their UX was awesome, but it wasn't innovative enough. People in UK had money and grew up on Amigas. The rest of the world was poor and Win 3.1 was good enough.
The same way OS/2 kicked butt, but Windows 95 and 2000 was sufficient (and cheaper).
Biting the hand that feeds IT
