There is no substance to this post, it is clickbait. Most of the listed languages wouldn't even be considered. Most of the other "languages" are irrelevant in terms of building a platform. Ex: SQL, Bash, Powershell, Matlab.
Hi dadro thanks for your comment, FYI I love Ruby and I've been working +10 years. My point is if you're going to build a startup you will need devs and Ruby dev's are getting harder and harder to find, new developers are preferring other languages turning Ruby into a dying ecosystem.
Let's see how this post will age...