>Yes of course your nokia 3310 lasted a week

See, your perception and memory are already getting skewed by your current situation. My Nokia 1616, which only broke recently, usually lasted over 2 weeks with active usage. The model I use now (a 2011 one) has a listed standby (i.e. the phone switched on and can receive calls and texts) time of 32 days. The amount of battery life people have traded is extreme.

And the thing is, there are still dozens of phones like that available on the market, both current and older models. If not triple digits. Including lower quality adaptations under the Nokia brand. And these devices exist because there is a market for electronic devices which do their thing for at least a whole day.

I just can't wrap my head around the fact that one market survives but the traditional music player one basically just disappeared, taking all leftover stock with it.

That explains why the Android devices exist, but I cannot believe that the kind of people who buy a DAP all want to stream music with a device separate from their phone. Vinyl players thrive, why isn't there a BIGGER market for traditional DAPs that you can use to listen to music on a journey? These short-lived players wouldn't even last long enough for some flight connections within Europe, let alone the respective train trips or a flight over to Asia.

My budget is 300€. What you linked there is Sony's lower quality rehash of their lowest quality Walkman before they scrapped that line. It only has 4GB non extensible storage and cannot play FLAC. I could find about 4 or so players which manage 24+ hours and Flac on my local (German) market atm, and they all have some sort of drawback. But the general state of the market seems to be "it runs Android and lasts 8 - 12 hours".