It seems that when implemented correctly, running full-stack Elixir can greatly simplify complicated distributed systems. In-memory storage can replace a cache, and the architecture itself can replace a message queue. Horizontal or even vertical scaling can replace complicated scaling mechanisms. There are plenty of advantages to running data pipelines in parallel too.

There's also a huge trend now away from managed cloud services (ZIRP), and it seems like Elixir with a database on the same machine or network could deliver great performance and scalability.

So why don't more people use Elixir? I've read some complaints about the lack of static types or not having as many developers. But if those were the only constraints, one would think that they could be overcome, or some service could just greatly simplify Elixir deployments.