> I don't know of many reasons to not use Phoenix. Personally my biggest reservation would be the difficulty of debugging production issues that span two langu

> I don't know of many reasons to not use Phoenix. Personally my biggest reservation would be the difficulty of debugging production issues that span two languages - Elixir and Erlang – when I have no familiarity with the underlying language (and when that language is not widely used, and therefore likely to be sparse on StackOverflow). That's not to say I wouldn't use Phoenix; it's just that that's the biggest drawback I can think of (aside from general ecosystem maturity, which it sounds like is on an impressive clip). EDIT: Oh, and Elixir doesn't have support for static type analysis (though it does have typespecs[0], and there is Erlang's dialyzer[2]...). Python has mypy[1], and JavaScript has TypeScript/Flow. [0] http://elixir-lang.org/getting-started/typespecs-and-behaviours.html http://elixir-lang.org/getting-started/typespecs-and-behavio... [1] http://mypy-lang.org/ http://mypy-lang.org/ [2] http://erlang.org/doc/man/dialyzer.html http://erlang.org/doc/man/dialyzer.html