Anything: Series, video game, book, food, old toy from childhood, service, etc. Also, any series which you wish did not end, etc.
Why? The quality was always shit. I’d rather keep the data port (Lightning/USB-C) and use an external DAC. For calls and meetings where audio quality is trash anyway, Bluetooth doesn’t necessarily degrade it enough to care.
Well that’s great because you could still do that even if they included a jack.