Good memories. We used OS/2 for a automated measurement tool and it was rock solid, at the time it was a great choice for true multitasking (pre-Linux and pre-NT).

My OS/2 experience got me a job at a company that IBM contracted to build a AppleTalk server component for OS/2 ("Lan Server for Macintosh", https://techmonitor.ai/technology/ibm_adds_macintosh_support...). You kids don't remember this but at that time there were a ton of incompatible LANs so we provided glue between Macs and PC networks. AppleTalk was actually pretty neat.