I loved OS/2, I really did. OS/2 version 1.3 was, in my opinion, the best small multi-threaded OS ever created. Period. Gorden Letwin and his team did an amazing job with it. Those who are interested might want to scrounge up a copy of “Inside OS/2” by Letwin and give it a read.
IBM’s versions, from 2.0 onwards, extended the OS with better GUI support, real multi-platform interoperability and backwards compatibility. I was an OS/2 developer from 1.0 through 2.1, and a participant in IBM’s OS/2 developer’s program (I even purchased several big PS/2 machines, very nice for their day, and gave presentations about it). I was also heartbroken when IBM pulled the plug on OS/2 and effectively doomed it to obscurity. But, I’ve since moved on to Linux and FreeBSD, and I haven’t looked back. At least not very often.