I have been writing Elixir full time for over 4 years now and I could not be happier with the language and surrounding community! With an incredibly small team (just myself and one colleague working on the backend), we are able to develop and operate very high throughput applications that reliably handle over 100k requests/s (2 main web facing apps, plus a handful of supporting services). We generate millions of dollars of revenue for our customers each week, and sleep very well at night.