Here's a nice article about it: http://techland.time.com/2012/04/02/25-years-of-ibms-os2-the-birth-death-and-afterlife-of-a-legendary-operating-system/ http://

Here's a nice article about it: http://techland.time.com/2012/04/02/25-years-of-ibms-os2-the-birth-death-and-afterlife-of-a-legendary-operating-system/ http://techland.time.com/2012/04/02/25-years-of-ibms-os2-the... The lasting benefit it seems to have as jaquesm said is reliability. Claim in article I doubt but shows they rarely crash: "Oh, and another thing: OS/2, Waldhauer, says, doesn’t crash. It’ll run for a decade without requiring rebooting." It's simple. It doesn't change a lot. It rarely crashes if that's to be believed. It's integrated into important systems for legacy effect. It also has at least one company at any given time updating it to work on modern stuff. So, that sounds like benefits a lot of big companies would be interested in. I think the drawbacks are too significant, though, especially it being a closed, barely-living tech without much of an ecosystem plus who knows what security or high-availability attributes.