(N.B. I work at Bleacher Report, but this is just my opinion) You're not wrong - that's certainly a factor - but Elixir is also just massively faster. Yes, un

(N.B. I work at Bleacher Report, but this is just my opinion) You're not wrong - that's certainly a factor - but Elixir is also just massively faster. Yes, understanding the problem domain helps. But we already knew the domain and had done refractors in Ruby before then: this isn't our first rodeo ;) Elixir is just much better suited to the highly concurrent tasks we use it for. Seeing 5-10ms response times on some of our services would just not be reasonable in Ruby/Rails. We know - we tried! But you're not wrong: understanding the problem IS key to building an efficient solution. It's just that the tools you use will also have an impact. Elixir is a great tool.