Bruce Springsteen writes a lot of songs. That has been apparent over a 50-plus-year recording career that includes 19 albums of original material, stretching back to 1973’s Greetings From Asbury Park,

After years of speculation and fan clamoring, Bruce Springsteen finally releases Friday “Tracks II: The Lost Albums,” an expansive seven-album box set and sequel to 1998’s “Tracks,” comprising decades of music — most of which is previously unheard by even the most devout Spring-nuts.