Well I can’t speak to most of those, but I can definitely speak to JS: pretty much the only things holding back FP are people’s aversion to reduce and their ave

Well I can’t speak to most of those, but I can definitely speak to JS: pretty much the only things holding back FP are people’s aversion to reduce and their aversion to grafting monads where they don’t fit. Otherwise it’s pretty much idiomatic to write functional-core code in JS basically everywhere. But again there be dragons at the edges.