I think the complaint is the global runtime namespace, not source modules. Statics live forever, and extensions in any library on a type apply to all uses in t

I think the complaint is the global runtime namespace, not source modules. Statics live forever, and extensions in any library on a type apply to all uses in the runtime (with no guarantees about conflicts). Mostly that's minimizable with good practice, but can be annoying to those used to hierarchical namespacing and static memory reclaimed after the class becomes unreachable.