I have been contemplating the same issue. Unfortunately I haven't yet had enough of a chance to write a large complex application to verify whether or not the Elm Architecture works in practice. In particular the potential for actions and effects of subcomponents to pollute the code of parent components concerns me. If you have some further insight I would love to see a blog post comparing React and Elm that demonstrates where the issues are. Also, the Elm community could potentially make suggestions or take those issues into account for the future.