By the way, sorry for brining this up now since I missed the original PR, but the [original commit](https://github.com/rails/rails/commit/1a40be02113287d9a003f8224e91b9f623857f4b) included a deprecation message for this change, which I find quite nice, because if I'm upgrading, I'd see the message before I get the error, which give me some hints about what I should do to make things work again.

Maybe it's not exactly a "deprecation warning" in the usual Rails sense, because this doesn't work at all anymore, but some sort of warning or error would be quite nice if I am currently using this today.