There's no such thing as a good UNIX. The world was a lot better when UNIX was considered a bad rip-off of Multics.
Q. How can you tell when they've cleaned up UNIX?
A. When there's nothing left.
I don't regard it a "real" UNIX, then again I wouldn't buy a
"real" UNIX, 1970s software technology is not something I
would want to buy today.
Getting caught up in the "pure" UNIX war will lead you to
restrict yourself to "pure" SVR4 implementations, in the
mainstream camp *only* SUN have gone for this. That in my
view does not make it much of a "standard".
If a vendor decides to do something about the crass
inadequacies of UNIX we should give them three cheers, not
start a flame war about how the DIRECTORY command *must*
forever and ever be called ls because that is what the great
tin pot Gods who wrote UNIX thought was a nice, clear name
for it.
The most threatening thing I see in computing today is the
"we have found the answer, all heretics will perish"
attitude. I have an awful lot of experience in computing, I
have used six or seven operating systems and I have even
written one. UNIX in my view is an abomination, it has
serious difficulties, these could have been fixed quite
easily, but I now realize nobody ever will.
At the moment I use a VMS box, I do so because I find that I
do not spend my time having to think in the "UNIX" mentality
that centers around kludges. I do not have to tolerate a
help system that begins its insults of the user by being
invoked with "man".
Apollo in my view were the only UNIX vendor to realize that
they had to put work into the basic operating system. They
had ACLs, shared libraries and many other essential features
five years ago.
What I find disgusting about UNIX is that it has *never*
grown any operating system extensions of its own, all the
creative work is derived from VMS, Multics and the
operating systems it killed.