OK, lemme see. Unix is being worked-around and bypassed like hell these days (SELinux, ACLs, ConsoleKit, PAM, graphics don't use /dev anymore, etc, etc, etc). And the Internet protocol is a huge failure, and again being worked around with SSL and stuff. And then email. OMG to that one. No sender authentication and spam anyone?Unix and Internet are old too, they're way older than 25 years. But its good stuff.
All of these old techs pretty much suck. We don't use them because they're so great. We use them because we're stuck with them.