A lot of companies got burnt on ruby related projects. Especially anything rails related. There is a steady pipeline of work right now for skilled developers to migrate services and code from ruby to go, Scala, java - basically anything else except ruby.
I have earnt quite well doing such gigs, although I tend do more erlang/elixir stuff these days.
I would always ask the clients what happened, and why they want to migrate rather than maintain or even build out their ruby code bases, and the answer was always the same - the developers in the ruby space were mostly sub-par. Often several degrees below java developers in terms of skill and ability. I would say it tallies with my experiences too.
It is also for this reason they are not using node js - because it was seen as the next shiny, all the half-devs from ruby jumped onto it, and the risk of crap codebases from the same amateurs is ever present.