A slight point on Erlang: Erlang is good on business logic and not really good on making something "mathematically nice". It is more in the same place than the

A slight point on Erlang: Erlang is good on business logic and not really good on making something "mathematically nice". It is more in the same place than the one you give to Go/Rust. Low latency good performance and great reliability (these things are linked) for web is a classic use of erlang or elixir.