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Depends what you are trying to accomplish.

If you are reaching for Django Channels in your Django project then yes I would investigate Phoenix, Phoenix.Channels, Phoenix.Presence, and Phoenix.LiveView.

Only if you want to go with LiveView. For Django, as I’m a Python dev too, I’m going with htmx+alpinejs. Or you can choose the Hotwire stack (Turbo+stimulus)

There is also Django Unicorn (https://www.django-unicorn.com/docs/), which is an implementation of LiveView for Django.

you don't need to learn Erlang first. you can directly dive into Elixir and Phoenix. the experience working with elixir/phoenix will be so soo good that it will be a hard to go back to any other stack.