These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Crazy Heart
Adaptation Displacement: The novel was out of print for years until the film came out, at which point it was put back into print with a brand new cover.
Before that, when Blake is opening for Tommy with "Fallin' and Flyin'" and Tommy come out to duet with him. At first, seems like a real jerk, stealing-the-spotlight...until you notice in the instrumental break when Tommy is urging the crowd to cheer Blake on, and he's just trying to relive the old days of student-and-teacher. Tommy even tells the crowd that Blake was the man he learned everything from, and to applaud him again.