The 7th gen iPod Nano is basically the idea form factor for an everyday mp3 player, and it sucks that the stack not just being “upload music files onto a usb drive” means the device is susceptible to just not work anymore one day.
One of my “never going to do but will often think about” projects is to try and build an open design music player that doesn’t try to be a universal computational device but is at least not extra wonky like all the random ones you find on Amazon nowadays.