There is really something to be said about using C as a teaching language. When you start with C, the entire process is laid bare. And fully agree with earlier observation that microservices are delegating the 'link' phase to a distributed operational/runtime regime. Just being able to see that (conceptually) would steer away a mature team from adopting this approach unless absolutely necessary.

One of the patterns that I have noted in the past 3 decades in the field is that operational complexity is far more accessible than conceptual complexity to the practitioners. Microservices shift complexity from conceptual to operational. With some rare exceptions, most MS designs I've seen were proposed by teams that were incapable of effective conceptual modeling of their domain.

But is linking the right way to couple business logic from two different organisational units?

That is the question being discussed.