Parent is absolutely correct. I can either work on Elm and deal with breaking changes like variable declarations (as noted above), or work on my React/Redux ap

Parent is absolutely correct. I can either work on Elm and deal with breaking changes like variable declarations (as noted above), or work on my React/Redux app, where I'm halfway refactoring from ReactRouter v3 -> v4 and Redux Form v4 -> v6, both of which are painful upgrades. Which would you rather deal with?