[AceJohnny2]

That's mostly my heuristic as well, except there's a sweet spot for Perl somewhere in the middle.

Python has a upgrade problem. We're still running a bunch of CentOS 5.5 machines which depend on Python 2.4. In my org, we still have scripts littered around that expect a later version of python, but are executed from just "#!/usr/bin/python" instead of "python2.7". which fails on those old CentOS machines, on which you can't just set a newer version of Python as default because that'll break many system utilities.

Also, Perl's syntactic sugar for regular expressions turns out to be very useful (and I say this after years of grumbling against it).