Apples and oranges - Phoenix is too new to compare with Rails as far as bloat. I am optimistic Phoenix can do a great job of fighting bloat because of the community&#x27;s learnings from Rails. But at the same time I would not be surprised if in 10 years Phoenix has order of magnitude same amount of bloat as Rails 5. Phoenix&#x27;s promise (last time I heard José speak) is &quot;productivity of Rails, plus high performance&quot;; the high performance mostly comes from the Elixir-based architecture, <i>not</i> from less bloat.<p>The whole issue of bloat in Rails is overblown because Rails has been quite modular since version 3.