This article is informative and helpful. 😁 I also found it extremely interesting on the theory about why polyrhythms were thought to have originated in cultures from the African deserts... I never really thought about it but it makes sense... Polyrhythms sound bad in rooms with a lot of reverberation because it smears or blurs the attack of the notes.

layrering polyrthyms sounds like a fun technique fr! Never noticed how it could apply to rap flows too