Before I got a smartphone in 2016, I used a sony walkman. Yes it was an mp3 player. I still miss it from time to time. Looks like new ones are still being made.

Very similar to this one

https://www.amazon.com/Sony-NWE394-Walkman-Player-Black/dp/B01CCESM8I/ref=mp_s_a_1_2?crid=1ENWDIXL1E7N0&keywords=sony+walkman+mp3+player&qid=1685823569&sprefix=sony+wa%2Caps%2C140&sr=8-2