I partially agree...but... I would say that Ruby/RoR usage is really regional and that is visible in the US,UK,Japan and bunch of other places. Remember that Java/C# were really popular even before Android and mobile platforms. Java was the obvious choice in the Android era, C# slowly caught up with the Xamarin and new initiatives like .NET CORE and CoreRT. Javascript / NodeJS got really popular because of the low barrier and huge community and fast adoption rate by large corporations.

Ruby(VM) is unfortunate for not attracting critical mass of users and capital. I mean cmon you can't really compare jvm.clr,v8 and ruby vm. It really is unfair. Ruby supports a lot of magic,different paradigm and the runtimes mentioned earlier received billions in funding over decades. Of course they are "fast".

I mean you need really expensive ingredients to succeed in 21st century in tech. You can be fast and elegant (Crystal,Nim) but what does it matter if you are not mature enough (java,c#,js). Or you are mature enough (ruby and its ecosystem) but you are not fast enough and you did not try enough to cover other markets (adoption by big companies was fairly low, Rubymotion was a poorly executed project so no Android/iOS coverage because of the high costs and lack of interest from community)