It's not "just" syntax, so it couldn't "just" be a new edition, but I suppose it's conceivable that a hack could be invented and then the old behaviour grandfathered into prior editions as was done for impl IntoIterator for [T; N] in 2021 Edition.

That's a heavy lift though, you may need to carry this special code around in every compiler, forever, and I haven't even figured out what such code should look like, it might be really hard to even write it.