Again, the normal case is not people maintaining their own giant collection of mp3 files. Just like with physical copies of games and movies, most people have decided they want the convenience of not having to manage an mp3 player library.

Same with purchasing. It is great that you want to pay the people who did the creative work. … Does that mean you buy every single album you listen to? Because you ARE going to have to buy a “massive collection” unless you only listen to one or two bands endlessly. Or, more likely, you will do what everyone does and decide “Well, I barely listen to that band and only like one or two of their songs so it it really worth buying?”.

It sucks for the artists who have lost their bandcamp revenue. But it was bound to happen because the model itself is fundamentally incompatible with the modern consumer base.