The problem is that Perl applications just aren't easy to standardize and package. Either you include all necessary modules with your application, in which case module updates are a pain, or you rely on the user to have all necessary modules installed already, in which case module updates may break your application (since there's no guarantee the user won't install a newer version with different features).

I personally think Perl is best suited to quick and dirty custom programming. For instance, I wrote a script yesterday to merge the results from a four-part poll, remove extreme results, and tabulate votes per person and votes per item. The script took maybe an hour to write, but writing the same script in any other language would have taken significantly longer, and processing the data by hand would have taken ages. Perl to the rescue!