[zeugma]

I don’t think I’ll be around long enough to ever see Windows multi-task as well as OS/2 did.

Probably not. Also, I loved REXX

[EasySt]

Yes, REXX was a boon. I used to to automate entire design data
manufacture and release processes at IBM, reducing design data
assembly, packaging and delivery to hours or minutes, instead of days or weeks.

The intelligent and intuitive OS/2 desktop is another part I expect not to be equaled in my lifetime. (The Workplace shell)
Those icons seemed self aware and spooky smart at the time…. ;-)

~Easy