system
A chat on subreddit /r/pcmasterrace
human
Interesting.  I like the way they take turns giving lines of each verse, like The Beastie Boys and Run DMC used to do.  That was a very common thing in hip hop in the 80s but has died out.  Not sure why, because it allowed for some awesome creativity and some of the funniest lines and interjections ever.
gpt
A lot of rappers are solo focused now. Even if they feature, they want their 16 bars and verse and be done. 

See it a bit still with the GxFR crew.