The thing that pisses me off is that we HAD devices for music, but phones pretty much replaced them all in the market. Now that they have replaced music devices, they take away the optimum connection for music. Capitalism is just a big failure from the perspective of giving consumers what they want.
I'm one of the vanishingly few who still use a standalone mp3 player for my music, currently a SanDisk Clip Sport, after my two Fuze players developed...faulty headphone jacks. (I cracked open the case of one (thanks to IfixIt's tools), and was able to restore normal stereo playback by grounding the jack to the adjacent charging port, but have yet to actually solder in a jumper wire to see if it's a permanent fix). Unfortunately the only remaining examples out there are new-old-stock, with the expected battery issues after so many years. Replacement batteries are out there for the Fuze, but I could only find one vendor (on Ebay) who had the ones for the Clip Sport. It's anyone's guess how old either of these aftermarket cells are.
I stuck with the SanDisk players because of my "unique" use case--I don't listen to albums, just a huge folder of singles that I listen to on random playback. Sandisk devices actually *do* randomize the track selection, unlike the (many? most?) generic Chinese media players you can find all over Amazon. All of those I tried after SanDisk discontinued their lineup, only pretend to randomize the tracks. I noticed I was unconsciously predicting what song the player was going to pick next with an unusual degree of accuracy, then realized the devices were playing the same sequence of songs every time I powered them up. Moreover, by watching the display and tapping the 'next track' button I could see that most of the time the device just selected the next track in its index, only occasionally jumping forward or backward, always in the same places, direction, and number of slots.
If any of the presently-available generic devices are capable of true randomized playback in 'shuffle' mode, I haven't heard of any since so many people apparently listen to albums or playlists in pre-defined order that my use case never seems to come up in the reviews. As for using my phone, I tried that when one of my Clip players unexpectedly stopped taking a charge, and the experience (whatever music player came with the Note 4, and then with VLC) was...less than satisfactory, not to mention its effect on battery life.
---PCJ