with completely composed music with live musicians playing new ish that isn't even an interpolated sample.

But yeah - listen to Dre Day and then listen to Knee Deep by Funkadelic for an example of a sample interpolation. Completely replayed key bass (and not even replaying the same notes) and other key board parts, completely different drums, different tempo etc. Meanwhile a ton of east coast HOF producers were doing straight up loops, adding scratches, and calling it a day.

Edit - even on Let Me Ride which someone up above called a straight loop, you can hear that that bass line is completely replayed (on live bass) and not looped from the original. Even more impressive since he obviously samples the vocals from Mothership Connection on the hook so he could have just kept it as is.