> Integration is hard.  So yes, people prefer to make new packages, this
>  way whoever likes it can install it and those who don't like it won't
> be affected.

Of course. And those are the "hoops" that need be jumped,

and have absolutely nothing to do with Emacs's coding practices

or culture, they're just plain old engineering challenges.  If one

has little time or is bored to solve them, it's easy to flee to

MELPA: a fresh start, no-one depends on the new package,

which usually has a user base of one (or close to it). 

João