True, but you kind of get to introduce what you want as long as it's popular and well backed. Even if I know a tool or language is better suited for a task, I always prioritize my employer's ability to maintain that project over time.

That usually means using similar technologies, or otherwise popular, and well backed technologies. Go has that in abundance over Elixir.

For any personal project I'd take Elixir the vast majority of the time.