I think it will always be around it just takes one person to make people aware of the blues.
There were a whole lot, I bought every blues record I could find, it wasn't just one or two people. My vocal influences were Ray Charles and Bobby Blue Bland
The blues was so big in the late '60s that it kinda wore itself out, and people weren't diggin' the blues as much.
I think the blues will always be around. People need it.