More songs = more music that is potentially accessible to more people with different tastes. I don't use apple music or spotify because they lack quite a few albums that I've had to source myself.
And the offering in 2003 is still way more songs than I have in a binder ... WAY MORE.
I would prefer a music streaming service to have nearly all of the albums or songs that I want to listen to. Having more songs means that is much more likely.