I tried to make Haskell work as a product language for a long time - and, until Rust was around, there was really nothing better than Haskell in terms of guaran

I tried to make Haskell work as a product language for a long time - and, until Rust was around, there was really nothing better than Haskell in terms of guarantees. Haskell is a research language: it's supposed to change and experiment with new things; the permanent in-flux state is by design albeit I wish we crystallised more of the good PRAGMAs as default.