I actually still have one that I use - but a bit of story first. When I was ~11 my father gave me his old iPod (4th generation IIRC), it had a 20 GB storage and could fit lots of songs. I kept using it until around 2011 when I got my first smartphone (a Nokia X6) which had 32 GB storage and 15-year-old me filled it almost entirely with music (to the point it became extremely slow to browse through the library, even just the artists' one - I wasn't insane enough to open the song list), and by that time the old iPod was basically unusable as it couldn't hold more than a few minutes of charge.
A few years of smartphone-only music storage passed (changing smartphone in the meantime and also using streaming services), then in 2016 I was gifted a 7th gen iPod nano (the last model produced) for my birthday and when on the train I've been using that most of the time: it only holds 16 GB but that's still a good amount of music, as I still have quite a few physical CDs and/or offline music files (some of which isn't even on Spotify) - and as a plus I don't have to use internet or battery on my phone. I haven't used it since lockdown started and I stopped taking the train every day, but still I think I'm one of those very few people still fitting in their usage niche.