Give that the whole selling point of Erlang/Elixir is scalability at the price of the rest, the article is really telling me to avoid the tech.
They likely have much more than 5 million users.
To put this amount in perspective, you get 5 million connections after receiving 3000 connections per second, which are never dropped and remain connected, for ~28 minutes. The majority of websites do not get even 300 requests per second.
Give that the whole selling point of Erlang/Elixir is scalability at the price of the rest, the article is really telling me to avoid the tech.