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Also all "functional" programs have their state somewhere.. just usually much stricter isolated and manipulated - so no difference in statefulness.

> I would rather inherit someone's stateful JavaScript or Java than a complicated codebase by a seasoned Clojure, Haskell, Scala developer. I stand a better chance understanding the sequential code than a complicated recursive monad. Depending how it was written.

True, but you add here the "complicated" attribute deliberately .. usually it is the other way round. The functional approach code is simpler to read and reason ( and usually not with much recursive monoids), while the believed sequential program has so many "concurrent" paths (even if there is no real concurrency, but just in the many hidden ways how the super distributed statefulness is manipulated).. not?

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program { available = {}; assigned = {}; main { program = programs { current_available = program.available { available += (current_available, 1); assigned - current_available; } item = program.requests { available (=) item { program.answers += item; available - item; assigned + (item, 1); } } } } } program { requests = []; requests += (add, 1); main { item = answers { new_requests = [(add, 1)]; available += (item, 1); new_request = new_requests { requests += new_request; } } answers -= answers; } }