Middle ground sounds a lot like median. Once you factor in concurrency I would suspect Elixir/Phoenix is much closer to those three than to Ruby/Rails in terms

Middle ground sounds a lot like median. Once you factor in concurrency I would suspect Elixir/Phoenix is much closer to those three than to Ruby/Rails in terms of realized performance for the resources. This is assuming a pretty vanilla MRI based solution on the beaten path. Also yeah, the sexy; I get the sense that Phoenix may be a better platform straight up..