Another point that was subtly made, but needs highlighting. If you are programming in ruby you are ONLY doing a front facing webapp. There are lots of servers

Another point that was subtly made, but needs highlighting. If you are programming in ruby you are ONLY doing a front facing webapp. There are lots of servers out there that run headless. The ruby ecosystem is completely dominated and controlled by rails. As a result, ORM mappings and gems are completely focused on a web-response centric world. As monolithic ruby apps are broken into microservices, ruby as a language will also be abandoned for those microservice back-ends - simply because the ruby ecosystem has only one way of viewing the world.