I never found most hip-hop lyrics being so deep that hey need some annotations for explanation.
Then it felt like very far fetched to me that people who considered annotating hip-hop lyrics now want to "annotate the world".
And now they can't live up to their promises, which perfectly fits in my, probably wrong, model of hip-hop culture in general.
For example I really like grime but I haven't lived in England for over a decade so I have no clue what a lot of their references mean when I first hear them because I never hear them in my day to day. Genius helps with that and a lot of other cases.
Jiggy-jabberjaw vitamin idol and primal rages
When bible page verse tidal waves begun (Water won)
I wrote the book that shook America to splinters
In a winter wasteland icicle-bound barren township
Call Baron Münchhausen and proud gimps to clinch this chemical war pig
Delinquent sinking like a paper tugboat well beneath your holidays
Beached on a red tide infested shore corroding eastern seaboard beauty
I'm a jigsaw slab, but all the pig saw was dirt bag