As a layman, I don't understand most of what you just said but it sounds like it's a small, cheap, elegant mp3 player for the modern time and that's surprisingly exciting. As enshittification spreads more and more, I wouldn't be surprised to see an upcoming exodus from music streaming subscription platforms and a return to a napster-like boom of music piracy as we collectively realize that we really only like listening to like 200 songs anymore anyway, and storage is absurdly cheap compared to 20ish years ago.

What is the best pitch for why somebody should use your device over the phones most of us have within reach? My hunch is that it's related to privacy or maybe for kids whose parents won't let them have a phone? Or is this purely a personal project that you're not looking to monetize?