Languages don't really exist in isolation, especially general purpose languages. They depend on community for things like libraries, support, compiler & tooling development, etc.

You can use a dead language if you want, but you're going to lose out on all of that. And you'd better not ever want anyone to help you with your projects...

AWK is Posix. Python is not. End of the story. POSIX awk will run everywhere, and GAWK has networking capabilities.

That's a very naive take. Posix is not the holy scripture. And have you heard of this OS called "Windows"? It's pretty popular.

In servers, IOT, embedded... Windows doesn't exist.