. . OS/2 is very good at running DOS programs. Each workstation has 3 to 6 DOS windows open at any one time, they are used intensively, and extremely fast network response is expected.
And those DOS applications aren't going away because the owners feel they are a very major reason they have been able to thrash the competition and become multi-millionaires. They can answer in seconds inquiries their much larger competitors take up to half an hour on.
And because I wrote those programs and don't care to rewrite them for some other OS.