I currently use Python but don't use Django but instead wrote my own WSGI frameworks based on Flask Restx. I'm not a big believer of ORMs besides their CRUD functionality so there is not much benefit for me using Django and the security burden it carries (like PHP) by being so popular. I can keep my designs light weight, very secure and fast; albeit not nearly as fast as Phoenix.
Note however, I don't build public facing high performance applications so its not critical to have max IO like that which Phoenix can handle.
In a way, I wished I had moved to Elixir but with the technical debt invested in Python its a very big jump. Maybe someday down the road...