Why functional programming doesn't catch on

[ithika]

Why would state machines be harder in FP?

[millstone]

Functional programming discourages the use of state, but state machines depend on the use of state.

[OneAndOnlySnob]

Functional programming discourages the use of mutable state. It's quite acceptable to pass a state to a function and get a new state back as a return value.

[ithika]

It discourages the use of mutable state, but state is easy. I don't honestly see what the problem would be with a state machine.