Hold on. You wear headphones while at the dentist? How are you supposed to carry on a conversation where they ask you question and you respond HOAYRA AH OT AH HA AH

I think Fiio and Hiby are the closest that exist today. They have dedicated hardware and physical buttons for the things listed in your comment. However, they do still ship with a custom Android OS and you need the touch screen to navigate your library and such. On the upside, this lets you choose your media library app. On the downside, it still isn't as good as the touch wheel on old iPods. I, too, am waiting for something like this to return. The Hiby is good enough until then for me.

I've got the first boards on my desk for a media player based around the Sifli 58 chip. 1.8" amoled display and 16 buttons.

https://imgur.com/a/45GuaEA

https://forums.rockbox.org/index.php/topic,55419.0.html

Anyone want to help with porting Rockbox?