This ship has sailed when people accepted that everything lives in the cloud and companies can dictate what you can, can't and must do with your own property.
The last thing they cannot take away and cannot control is offline physical goods, like books for example.
See my other comment about the ability for any iOS device back to the original iPad to be able to download “the last compatible version”.
But to your point, even on a 1st gen iPad - at least the last time I tried a couple of years ago - you can still play music you bought from Apple using the Music app. As far as I know, iTunes still supports every iPod and iOS device ever made.
The last thing they cannot take away and cannot control is offline physical goods, like books for example.