40-50 people is tiny indeed, but Haskell is supposed to help quite a bit here. 6 million lines of c++ and 50 people could be very hard. I’ve seen 4 million sl

40-50 people is tiny indeed, but Haskell is supposed to help quite a bit here. 6 million lines of c++ and 50 people could be very hard. I’ve seen 4 million sloc of c++ and 80 eng, and it is hard. Investment banks are extremely complex systems - 6 millions sloc, even in a very expressive language, make sense to me. What’s harder to grasp is the real complexity of an IB - it took me years to get that. 30 years of random, non homogeneous software evolution, coupled with 30 years of funky human made rules in 200 countries. It’s going to be big and messy! And I really wish it were easier. To some extent, it’s a bit like Unicode, or font rendering, or the tax code : on paper it’s just a bunch of rules, but for real, it’s big and complex.