Why the cheap swipe at Haskell? We use Haskell very productively in the real world. You can take a look at some of our blog posts here, if you want to learn more: https://tech.channable.com/

Here is one post about writing an Aho-Corasick implementation in Haskell which is as fast as the fastest Rust implementation: https://tech.channable.com/posts/2019-03-13-how-we-made-hask...