I still want to run SCO UnixWare 7.1 (Score 1)

With SCO UnixWare 7.1 I get lxrun to run Linux binaries, plus the Veritas (now Seagate?) vxfs journaling file system as standard. With the addition of Merge 4.X, I get to run DOS, Win 3.X and Win 95 and their applications.

The forthcoming addition of a journaling file system to Linux will tilt things further in favour of Linux, of course.