A lot of cocaine, an awful lot of bad language, and some painfully honest bits from Davis's autobiography about what an absolute bastard he could be when the drugs were in control. And how badly he treated his women. Some of us sixties/seventies types won't be very comfortable with Davis's admission that he only got into fusion-funk (Bitches' Brew etc) because he could see that it was an easier way to get rich than by playing "proper" music for a living.
Ouch, there go a few cherished beliefs....I completely lost count of the interview vox pops from the rock and blues world - forty, fifty? Immaculately structured. Excuse me while I go and watch it again.
https://www.bbc.co.uk/iplayer/episode/m ... f-the-coolBJ