Honestly, I have trouble finding out if these devices even do playlists, and if so, what format? I have a sneaking suspicion that, while I have some "musts," I

Honestly, I have trouble finding out if these devices even do playlists, and if so, what format? I have a sneaking suspicion that, while I have some "musts," I probably don't even know the right questions to ask, and I guess forums for this kind of thing stopped existing.