Using tagless-final to manage effects has seen some buy-in in the Scala community, but the benefits are questionable and the drawbacks significant

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John A De Goes

The False Hope of Managing Effects with Tagless-Final in Scala is a technique originally used to embed domain-specific languages into a host language, without the use of Generalized Algebraic Data Types. In the Haskell community, tagless-final still refers to a way of creating polymorphic programs in a custom DSL.