For most people these days, it seems like the answer is that they use streaming services. I would also venture to guess that the majority of my friends seem to use Spotify as their service of choice.

I go back and forth all the time. I have used Spotify for periods of time, I've used Tidal for a while, Apple Music, and also Google Music. Most recently, I"d been using Apple Music, but I traded in my iPhone for an Android phone and no longer had that option.

Because I'd already been paying for YouTube Premium (it's worth $13 to not see ads), I already had access to YouTube Music, which used to be Google music, and I even had an old library there when I used it before.

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Google Play Music / YouTube Music (28.57%) 4 / 14 SoundCloud (21.43%) 3 / 14 Other (please list in comments if you can) (21.43%) 3 / 14 Apple Music (14.29%) 2 / 14 Bandcamp (7.14%) 1 / 14 Spotify (7.14%) 1 / 14