We are replacing all our python backend by golang and indeed static typing is a good way to well structure your data. Regarding reliability, I would prefer elixir for 3 raisons: #1 Functional programming. In go it's really easy to make error by sharing object reference in channel. And what is funny is that it's not so easy to make a deep copy of an object. #2 Goroutine leak and supervision is really difficult to follow. How do you manage it in production ? Thanks to erlang, elixir provides all you need to monitor your green threads. You can even hot fix issues. #3 Beam preemption is clearly a strong winning point.

Bonus point, go scalability is limited to your server. In elixir you can remove server boundaries.

For a new product, I will definitly bet on elixir.