Bonnie Raitt, Lucinda Williams and Loretta Lynn Are Rocking On and On

The music industry may worship youth, but according to Bonnie Raitt, ”in the fringe of the business, ageism isn’t as much of a thing.” Both Raitt, 66, who has a new record, ”Dig in Deep,” out this month, and Lucinda Williams, 63, have remained prolific, to critical acclaim, since they rose to fame in the ’80s.