How many people are actually going to download a torrent client, navigate through some massive torrent file collection to check the files of the artists they want to download so they can upload mp3s to their phone over a USB cable like it's 2004 again, just so they can avoid paying Spotify?
A sufficiently seeded torrent is a high latency static CDN.
You just need a client that can make use of it.
I'm not sure if anyone will be interested in making one however, you can already get a patched Spotify APK from the usual mobile piracy spaces that's good enough.
> upload mp3s to their phone over a USB cable like it's 2004 again, just so they can avoid paying Spotify?
I do that not because I don't want to pay Spotify, but because it is more convenient. I want all of my music in one place (VLC), and Spotify doesn't let me export my library as OPUS or Flac. Some stuff in my library is only posted on SoundCloud, some are old mp3 recordings by friends, and another 30% are only on YouTube (small cover artists)
Most people won't listen to 10tb of unique tracks in their entire lives, let alone 30tb or 300tb... 1tb of music is about a full year of 24/7 unique tracks
That's unnecessarily worst case. No one is seriously using a usb cable to upload mp3s. There are plenty of paid and free spotify clones anyone can throw up.
How many people are actually going to download a torrent client, navigate through some massive torrent file collection to check the files of the artists they want to download so they can upload mp3s to their phone over a USB cable like it's 2004 again, just so they can avoid paying Spotify?