I ran OS/2 warp for a couple of years. I used it a crash-proof DOS/Windows host for software development.
That's precisely what I ended up doing. Windows was running like a dog and not reliable. Installed warp and ended up with 100% reliable system that just did not crash. Whenever the dev environment (Delphi at the time) crashed, unlike on native Windows, it did not take the whole system down with it.
And running Windows software on it ran faster than on Wfwg 3.11. And it had REXX.