IllmaticDelta
Veteran
Funk and Disco were offshoots of R&B.
Funk and Disco are variations of Soul music
soul (secularized gospel music singing)
funk (a variation of soul with more syncopation and heavier grooves)
disco (a variation of soul-funk that was lusher with 4/4 hissing hit-hat sound pioneered by Philly Soul)
R&B is actually much closer to Blues,
real R&B is closer to blues, small band swing jazz (jump blues), early rock n roll
while Disco and Funk were heading more in the direction of Rock and Roll.
disco had things in common with rock n roll but it was closer to soul and funk for the reasons I already listed
I am no musicologist so I don't know where the dividing lines are, but there are and were dividing lines. Look at the career of Johnny Taylor. He went from Gospel, to Blues to R&B to Disco. There were clear dividing lines in the music. Joe Simon is another guy that went through all of those genres and then he went into Country music.
this is true
Btw, some of the 80's music was excellent. Stevie Wonder, Michael Jackson, Luther Vandross, Phyllis Hyman, Freddie Jackson, Prince, Ashford and Simpson, and Stephanie Mills etc., put out excellent R&B songs during that era. Stephanie Mills was great in the 1980's.
80's had heat for sure but the 90's were better