MTL is a library for composing monad transformers and making it easier to work with nested monad transformer stacks. It originates from the land of Haskell, but has made it into Scala a long time ago. For the longest time however, it was barely usable, because of a bunch of different Scala quirks coming together. With all this, I feel many have the impression that mtl is something scary, abstract or too complicated. In this blog post, I’ll try my best to disprove this notion and demonstrate...
