Things get ugly pretty quick. Plus, stacking monad transformers ain't cheap. You end up rolling your own most of the time
"Don't write IO in Scala. Don't write anything in Scala." IO in Scala is just as safe as it is in Haskell. Reasoning otherwise is busted.
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In theory you're right. But making your way out of IO in Haskell is very painful and unpredictable. Good luck writing a complex program
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While doing the same thing in Scala is... well writing Scala as it was designed, without an effect tracking system
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