Not a direct answer but the BEAM, Elixir and LiveView are ridiculously easy to scale vertically (i.e. add more CPU and RAM, the scheduler takes care of everythi

Not a direct answer but the BEAM, Elixir and LiveView are ridiculously easy to scale vertically (i.e. add more CPU and RAM, the scheduler takes care of everything else), and horizontally (cluster forming and distribution of processes among multiple nodes is a first-class feature) If people build multi-billion dollar companies on top of PHP and Node.js, I would not even be concerned about scaling Phoenix.