You didn't have a choice when it came to protocols for the Internet; it's TCP/IP and DNS or you don't get to play. Everyone was running dual stack to support th

You didn't have a choice when it came to protocols for the Internet; it's TCP/IP and DNS or you don't get to play. Everyone was running dual stack to support their LAN and Internet and you had no choice with one of them. So, everything went TCP/IP and reduced overall complexity.