AWK is a great little language. But you know how some people get hung up on the useless use of cat, I get triggered whenever I see a grep piped into an awk.

And on the subject of the useless use of cat, I like the form because it makes input a normal command(replaceable by any other command), rather than a shell special form. I sort of wish that "tee" would not default to emitting on stdout to better act as cat's compliment.