1) The only issue here is network latency, and if you're not crossing half of the world it is not that high (elixir/liveview itself does not take much time - l

1) The only issue here is network latency, and if you're not crossing half of the world it is not that high (elixir/liveview itself does not take much time - like single digit milliseconds, maybe less) 2) it's possible to combine both approaches, using bits of javascript to fill in client-only animations etc.