> A huge Ruby backend application becomes quite difficult to reason without a good type system. It's not impossible, just more difficult than say Scala or Haske

> A huge Ruby backend application becomes quite difficult to reason without a good type system. It's not impossible, just more difficult than say Scala or Haskell or Rust, that have very strong static types. It also becomes difficult to refactor if you don't have a very good test suite. From personal experience, refactoring an Elm application is way way easier and more error-free than refactoring a Rails app.