As a jazz musician who primarily uses spotify as my source for music I am happy to say very very rarely have I had trouble finding a paticular album in the library. However, I know from personal frustration, but also from countless of my fellow musicians, that the limited amount of credits on each album and always having to redirect myself to wikipedia is an inconvenience. In some genres and especially in jazz, for people who are big fans of this music, knowing who played the piano, drums or saxophone etc. is a huge part of understanding the music. Having a list of the personal on each album and perhaps each track should be a part of spotify's library. I would gladly do it myself if I were compensated for the time it would take. But there really should be personnel list on most jazz albums.