First off, not everyone likes those technologies for a variety of reasons--and solving a front-end solution a an alternative is valid. Outside Elm, PureScript, BuckleScript, and ReasonML all work fine with JavaScript libraries and have React interop/wrapper libraries already. I may dislike it, JSX is supported out of the box with ReasonML. I think some pain with JS interop could be worth the trade-off for either better types, managed IO, no null by default, immutablility by default, no option for any, exhaustivity, and the list go on--not just as a linter feature or a config option but built into the language.