Well ... I don't use Elm in production. But, I'm sure there are people out there who got gaslighted because of this ill-conceived move, and they can better explain about 'production readiness' story that was weaved around Elm.
> Hence the fact that it is v0.19
I also don't understand how can a minor version 0.18 -> 0.19 completly break backwards compatibility even if it is not stable. Well may be it's just Elm. They should have atleast thrown a `deprecated` warning and maintain backwards compatibilty till the next major version.