[crtasm]

I don't disagree that AAC is better, but other than iTunes most people buying from the stores mentioned on this subthread are buying MP3 (if not lossless).

[acdha]

Perhaps - I haven’t bought MP3s since the 2000s since sites like Bandcamp almost always offer lossless or AAC — but I was also thinking about how almost all of the streaming services use AAC, too, and that’s a huge chunk of people’s listening.

[crtasm]

For sure, but the context here is owning files - not listening to music in general.

Looking at Junodownload/Beatport/Bleep they don't offer AAC at all, that's a little surprising.