None of the forks really have the same design goals as Elm though, so if you're compiling Elm code into JS you're probably using the Elm 0.19.2 compiler, not a

None of the forks really have the same design goals as Elm though, so if you're compiling Elm code into JS you're probably using the Elm 0.19.2 compiler, not a fork. - There's an outside chance you're doing Zokka to allow for custom package repos (I think that's the only difference). - You may be using the Lamdera compiler to use Set and Dict natively with your custom types. If you're doing something other than compile Elm to JS for UIs, you may in fact be using one of the actual forks.