The certification test suites are clearly a superset of what most "Unix" applications require. I haven't used UUCP since the 90's, have you? I ran a UUCP node

The certification test suites are clearly a superset of what most "Unix" applications require. I haven't used UUCP since the 90's, have you? I ran a UUCP node for about 5 years. Fun times, but not exactly useful today.