Most of the awk scripts I end up writing are for execution by other people on machines I don't have control over. If strptime was in the standard library, I could use it if I knew the target OS was something like "Ubuntu XX.XX or newer, RedHat X or newer".
When strptime is in an add-on library, I can't use it.
When strptime is in an add-on library, I can't use it.