Oh yes. Thank you for the correction. The fancy name has kept me away so far... fearing it's yet another monad thing which I have not seen explained in a way that not only makes sense to a 5 year old but far more importantly show clearly and indelibly why it's so important to begin with. Same for any 'math theory' derived concepts. I hope ReasonML won't fall in that 'too smart for the average guy' category.
the question I had asked that brought up 'algebraic effects' was: does ReasonML have optimized generator implementation which is an essential high level concurrency primitive. I was told generators and other concurrency primitives can be built on top of algebraic effects.