I Built My Own Audio Player

Dang, I thought he had built his own hardware.

I'd still love to get a proper successor to the Sandisk Sansa Fuze, just with USB-C charging instead of its proprietary charging cable.

There's plenty of "luxury" /audiophile MP3 players out there which cost in the hundreds of dollars, but that one was in the sweet spot of bang-for-your-buck music player that I could just use for listening to music on long plane rides etc. without draining my smartphone battery.

You have many options for DAP, unfortunately they are often android based. In some rare cases, they are either pure custom OS, or stripped down android device. I have a Cayin N3U, I hesitated a lot with some Hobby device as it's a small brick and Android, while the android interface is still too present for my taste, and a bit too large, I have no regret, I really wanted something dedicated, no Bluetooth, tube, portable, no streaming, no extra app.