unfortunately, true. We'll have to keep fantasizing what a working USB player could be like...
Or if only we had Spotify in N.America instead of the lame Slacker for streaming audio, maybe I wouldn't care about the buggy USB player...
I haven't contributed any new observations to this thread in a while because most of the old bugs from a couple years ago are still there, but at least they seem to have stabilized in the past several firmware updates. (currently on 2018.21.9). Meaning no new bugs, just all the same old ones, and no expectation that anyone at Tesla ever looks at any of the code for the media player. So I've learned to just expect that sometimes when I get in the car, the previously playing song won't be remembered, or the wrong (or no) audio source is selected, or that .m4a/AAC tracks will cause random loading errors and momentarily mute all in-car audible alert sounds, etc.
One problem that did go away several firmware versions ago was the random re-scanning of the entire USB stick for no reason (slow with a large music collection). I had NOT seen a single instance of random re-scan for many months, that problem seemed finally fixed a while ago...
... until today, it happened twice within a few hours in the same day, each after parking the car for a while and returning. Nothing else seems to have changed, so I don't know what triggered this sudden reoccurence of the rescans.... (same USB stick, no change in my music collection on the USB, no FW update for >1month, no recent change to any of the car's settings, etc)
btw, I haven't been following the Model 3 threads - just curious, are M3 owners having similar problems with their USB music player? - I wonder if it is based on the same code as Model S or did they rewrite and fix everything in the M3?