There are some points from that article that are false: there are podcasts, there are collection of good Ruby gems, and analysis the unicorn companies that were started with Ruby (or Rails) is a biased analysis.

So, if you decide to switch, it is only logical for you to believe that the Ruby community does not bring anything new to the table. I am not saying it as a bad thing. I decided to stay with Ruby, so of course, I am looking for clues that my decision is still reasonable.

One point about your last phrase: the market for Ruby developers - especially seniors - is active. At least in my own corner of the internet.