[rapsey]

I went from Erlang to Rust and frankly I would not say Erlang is more productive, despite being a very high level language. When building a non-trivial system one should think about total cost of ownership.

A Rust program is by default going to be CPU and memory efficient. It is not likely to negatively surprise you in production with weird bottlenecks and unexpected behavior.

The time invested in producing a solution which is statically typed, pays of in spades when it is time to refactor or change something (which is pretty damn often if it is your product). Refactoring a Python/Erlang/Elixir/C/PHP solution is a major PITA and fraught with new bugs.

The time spent optimizing solutions in high level languages when they are falling on their face in production is generally ignored and extremely common. You do not have to be github to face performance problems in Ruby.