[lazulicurio]

IMO the main issue with modules is that strong encapsulation is actually a bad goal. If the focus was solely on reliable configuration, I think that the transition would have gone better.

WRT why I think strong encapsulation is a bad goal: I've worked extensively in .net where assembly-private members are the norm for core libraries. It has issues. Classes and methods that are theoretically extensible aren't so in practice because core logic is inaccessible.

In the end, encapsulation, no matter how strong, doesn't prevent people from relying on internal implementation details. If the concern is people relying on "internal" APIs, either suck it up and make those APIs public (with all that entails) or come up with a deprecation strategy (or just freeze them and refactor around them).