> Why? There is no positive reason to make Emacs module code resemble
> Emacs core code.
Of course, there is.
Which one? Given the overall state of the Emacs core code (lots of global mutable state, thread-hostile, lots of macros...) I'd rather want modules to be as different from the Emacs core as possible.
The module interface is an interface. No good interface prescribes how its implementations have to look like.