I am more productive in a language with an expressive type system (e.g. Haskell) than one without. Thinking about types not only guides me towards a working sol

I am more productive in a language with an expressive type system (e.g. Haskell) than one without. Thinking about types not only guides me towards a working solution quickly, but the checker catches all my minor mistakes. In Haskell, you can actually defer all type errors to runtime if you want to. But I have never felt this makes me more productive.