So you're becoming a niche developer. Congrats, now is time to shine and rack in the big dough. While everybody flocks to Python, go search jobs for Perl and ask for big buck. I bet there are plenty of legacy projects for Perl.
There are at least 3 somewhat big companies that have huge Perl codebases and a lot of Perl developers (>2k each) - Booking.com, Ebay, PayPal.
Source: worked in one of the companies above myself till this year.
I am pretty sure Perl developers cannot ask for big bucks just yet, perhaps in 10 years?
I moved from python to Perl in 2011. I miss writing Perl but career options are a lot better using Python - there are more of them and the money is better.