Thanks for sharing, really happy to hear this! :)

Slightly off-topic but how would you convince upper management or a fresh startup to use Haskell? What would be the selling points compared to more mainstream (non-lazy) functional choices?

I'm pretty fluent in Haskell, but finding Haskell jobs is hard compared to OCaml or F#, which are a bit of a niche of their own. Actually, I routinely get OCaml offers when advertising Haskell on my CV. I find this interesting and exciting as OCaml was not very frequent outside academia a few years back.

I think management would have to buy in on developer investment. People who want to work with Haskell, on average, seem quite devoted. I feel like those devs who really want to use Haskell at production scale truly believe in functional programming as a superior endeavor, also, most devs devoted to Haskell also love advanced type systems and are particularly drawn to deeper Haskell the more they do it.

Long statements, but I really do think employee retention and personal fulfillment would lead to a better working environment. So that is the way I’d argue it. Obviously a comprehensive sampling of performance metrics would be needed along with the more HR reasonings, but I think there are plenty of examples where Haskell is performing acceptably.