True enough. But when it was big, it was nothing special. 2.2 (2, in the final number scheme) was pretty crashy. One would not expect a Bell Labs person to find a SysV variant interesting.
As I recall, solarix had Doors by 2001, but I can't remember what it was.
Solarix probably deserves mention if Tru64 nee OSF/1 did. Ah, the Unix Wars: Sunview vs. Motif, buggy vs. ugly.
