Despite the fact that nearly every great artist will reach a point where everything they do will be considered a “comeback” of sorts, the fact remains that very few songwriters seem to have much left to say after their 50th birthday. Stretching from Paul McCartney and Neil Young to Brian Wilson and David Bowie, the list of artists who have simply become lesser versions of their earlier selves is long, littered with onetime visionaries who are left to make warmly received but soon to be forgotten albums. But some songwriters do manage to find a second life, and the select few that have experienced a career renaissance have done so by moving away from what they have already proven they do best. Take Bob Dylan and his back-to-the-basics exploration of bedrock American music forms or Tom Waits and his willingness ...