I use and maintain an "ipod" in the form of an old pixel 3 with 128 GB of memory that has no SIM card and no software installed except for VLC.
It stays in airplane mode. It has a real headphone jack.
It stays in airplane mode. It has a real headphone jack.
Where I think they're missing a trick is trying to imitate the admittedly iconic iPod classic design, especially when no one is building around a hard drive any more.