I used it everyday for about ten years and don't recall it being fragile. He has several articles on his website going in depth into OS/2. Most of the problems he encounters is related to the piss ...

For reasons I'd rather not get into, I'm using an OS/2 Warp based production server for a telecomm app. The thing does it's job, and has sat more or less untouched for several years at this point, but ...