First I think a very large number of developers don't care for functional programming.
Then Phoenix is mainly run by only two persons, Chris McCord and José Valim (who also manages Elixir and Ecto). If I compare the pace of development and what you get out of the box with PHP/Symfony (I don't know RoR) it's quite clear that Phoenix is not there yet (without even speaking of the difference in ecosystem size).
Having said that I'm excited for Phoenix 1.4 https://github.com/phoenixframework/phoenix/milestone/17
First I think a very large number of developers don't care for functional programming.
Then Phoenix is mainly run by only two persons, Chris McCord and José Valim (who also manages Elixir and Ecto). If I compare the pace of development and what you get out of the box with PHP/Symfony (I don't know RoR) it's quite clear that Phoenix is not there yet (without even speaking of the difference in ecosystem size).
Having said that I'm excited for Phoenix 1.4 https://github.com/phoenixframework/phoenix/milestone/17