Elixir has always been fashionable to build high performance systems in. In fact, it is more suited for AI applications than any other language or framework because of the BEAM architecture and the flexibility of the language itself. I wish more people gave it a chance. You get insane performance at your fingertips with so much scalability out of the box and your code by default is less error prone compared to dynamic languages.

BEAM offers concrete benefits for agent frameworks: cheap preemptible processes, OTP behaviors like GenServer and Supervisor, ETS or Mnesia for fast state, and clustering tools that make managing thousands of stateful agents and restarts tractable.

The tradeoff is heavy ML still lives in Python and on GPUs, so run models as external services over gRPC or HTTP or use Nx with EXLA for smaller on-node work, and if you need native speed use Rustler NIFs or ports but never block the BEAM scheduler or the node will grind to a halt.