Already done. It’s called Torrent Streaming and lets you stream-on-demand anything that exists as a torrent without having to torrent anything yourself.

A client that can stream these Spotify torrents with an interface that works like Spotify (low bar, I know) will be awesome, but also including a database to match songs to artists so users can send money directly to the artists they listen to will make it revolutionary.

These points were all disproved long ago. The jack is a the same thickness as the display.

The reason is because BT headphones have a much higher margin, and need to be replaced every few years because of the battery (if not already replaced because they were lost or damaged).

It’s just a dumb cash grab.