Every conversation, since episode one.

Hernán Rivas Acosta's first Erlang game server, a football game for Cartoon Network, reached 50,000 concurrent players on one machine. The BEAM didn't stop it there. The OS file descriptor limit did, and the team chose not to raise it. The Java option they had considered would have managed a few thousand.

Brex runs on Elixir. Klarna runs on Erlang. Mastercard is believed to use it. And most of the community that builds on these systems watches them with PromEx - a library written by today's guest.

The Navajo Nation inside Arizona observes daylight saving. The Hopi reservation inside the Navajo Nation skips it again. There's a corner of the Yucatan Peninsula that takes 20 minutes to drive through and costs you an hour on your sat nav. No compiler warns you about any of this.

Everyone has an opinion about whether the BEAM is fast or slow. Almost nobody has actually measured it properly.

Bandit quietly became the default web server in Phoenix. Mat Trudel wrote it by hand, in pure Elixir, as a side project - and kept it that way even as AI changed how everyone else writes code.

What if instead of making your server smarter to handle the browser, you just ran your Elixir in the browser instead?