DECSTBM doesn’t work because of our unicode half-block shenanigans. We’re squeezing two pixels into each terminal character, and so we want to be able to “scroll” in half-pixels; our scroll needs to turn lower half blocks into upper half blocks when we’re moving vertically. That operation just doesn’t exist.
While IHaskell is proof that notebooks are valuable in Haskell; Sabela is an experiment in whether the GHCi-as-kernel approach yields a better long-term tradeoff for reactivity and environment UX.
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