Plan 9 is inspired by UNIX (Helps that it had the same devs), but it’s not a direct continuation.
UnixWare is I think the only direct continuation of the original AT&T UNIX. The various BSDs are close enough but were re-written entirely in the late 80s/early 90s so there’s nothing original remaining.
Plan 9 is inspired by UNIX (Helps that it had the same devs), but it’s not a direct continuation.
UnixWare is I think the only direct continuation of the original AT&T UNIX. The various BSDs are close enough but were re-written entirely in the late 80s/early 90s so there’s nothing original remaining.
BSDs are “Unix of Theseus”, so they are the closest.
Solaris is a direct continuation that didn’t have a rewrite of anything after any litigation.