There are things where the Ruby/Java version will be faster to use, more polished, or simply exist in the first place. I mean, yes, you can probably kinda sorta

There are things where the Ruby/Java version will be faster to use, more polished, or simply exist in the first place. I mean, yes, you can probably kinda sorta get something working with BEAM languages, but I'd occasionally hit something where Ruby had a gem, and Erlang didn't have much.