Stronger and stronger typing makes this ABI guarantee stronger and stronger. Dependent typing could package theorems about the properties of your interface and then ensure that all matches satisfy those properties. You'd like depend upon their theorems to prove things about your own program knowing that nothing can break.
Certainly, but it's going to become more and more so. The right way to do an API is to expose your invariants. Some day that will be a thing—and the distributed problem will still be here.
