In the late '70s, I had a band - the David Johansen band, for lack of a better name - and I started collecting, not records, but tapes from people I knew who had jump-blues records.
It costs so much to promote something these days that almost always safety is the preferred option, reference back to things which have been successful in the past. Also, people are simply not given the time to develop and find themselves and their audience as we were.