I would also like to know if ReasonML makes some "guarantees" of zero runtime errors like Elm does. That's one reason what makes Elm attractive to me, though I haven't programmed much in it.
It does not. sgrove posted this above https://vimeo.com/242081961 which is a talk he gave. Ended up watching it all the way through and came away being happier with ReasonML than I was before (eh, preconceptions because Facebook). It is a good talk, but please ignore the graphs because they aren't scientific in any sense of the word - more emotional appeal statements.
