I suppose the difference between a "quick fix" in a language and in a codebase, is that the former will be crystalized forever.

Language designers seem to like to bang the drum about the ethos of "Orthogonal Features". I know Go's have, in presentations. But that seems to be cast off when the going gets tough. See also "Contracts" in Go generics, which is mostly the same thing as the existing Interfaces feature, but working around the fact that interfaces didn't have a good story for symbolic operators. Orthogonal? Smorthogonal!