@layman,
Years ago I decided to learn a musical instrument. I bought some books on reading music and started poking at my guitar until sounds came out. After a couple of years of miserable failure, I stopped torturing that instrument (and my family). One thing I noticed, though. I couldn't play any chords, but the basic blues rhythm came pretty naturally and easy. I would sit and just repeat that rhythm over and over. Never got any further than that. There's something very deep and soothing in those rhythms. It speaks to the primitive portion of the brain, maybe...
I like a lot of the blues covers better than the originals (not all). I hope the blues evolves and doesn't become the "Latin" of musical genre.
I never realized that about rock n' roll. It was born and died in the fifties! Most of pop music that came after couldn't be classified as the original form of rock n' roll. They just called everything rock n' roll and popular music evolved.
The search for new blues continues!