Then you don't know neither awk or sed. Most of awk can be redone in Perl with ease, and for regex matching and replacing with sed, PCRE and Perl were practically made for that.

I mean, sometimes for small edits sed it's better, and awk for some tabular based files by using xml2tsv or lots of TSV related tools.

But for medium sized projects, Perl it's the obvious tool against something that requieres something similar to awk/sed but more complex data parsing.