I wouldn't pick Elixir because:

Rails has revolutionized web application development on Ruby, with Sinatra as the minimalist version and a lot of "me too" frameworks have been developed, and somehow I like them all.

* On Python, Django and Flask * On Elixir, Phoenix * On Crystal, Amber * On Javascript Express js for Sinatra. But on JS we didn't get a successful Rails clone, but a storm of front end frameworks, finally Vue JS/React and endless others.

I wouldn't pick Elixir because The world is elsewhere: My choice is on JavaScript ES6, Vue, and a simple Express.js, Sinatra, Flask for most projects.