[refulgentis]

" (beyond the well-established Haskell-esque effects bad)"

read that as:

"beyond the well-established idea, from Haskell, that side effects are troublesome and need to be explicitly modelled and thought about."

[curryhoward]

Ah, I think your clarification makes a lot more sense than your original phrasing, because Haskell's position is indeed that side effects are bad, not that effects are bad. The bad thing is "side", not "effects".