no, don't learn ruby on rails today. Companies still use it but I highly recommend using Django or Flask and Python as an alternative if you're starting from the ground up
Believe they'd say that popularity of the language is on the upswing rather than down. In a world where JS, Python, and Perl already exist, is there still room for Ruby? (Mention Perl because I believe it might fill some Ruby use-cases, and is generally already installed on Unix.)
