in reply to Migrating from Perl to other language? Why would someone do that?
People, in general, don’t “move away” from languages, because there is, in every shop, a well-established body of existing source-code which is in service and which therefore has great business value. It is usually deemed to have little return-on-investment (ROI), and great business risk, to rewrite such systems ... although it does happen.
Shops do seek to standardize on one or two technologies, especially for new initiatives, and their choices do evolve. In your case, it appears that your shop prefers Python and/or Ruby ... and, so be it. Happily do what the Romans around you are doing. If that presents you with the opportunity to learn a new language (and to get paid for it!), so much the better.
The next shop you wind up in ... who knows what its language-mix will be? The more languages you know, the more in-demand you will be, and the better perspective you’ll have on all of them. You’ll see all of them in-context, and you won’t be too likely to indulge in “language wars” discussions because you’ll see that there is no such war. All of them are industrial-strength tools that are (heavily) used in our industry, where all of them are giving excellent service.