Yes, same for me. Also a bad assumption I made: People probably have enough storage space. The number of people running around with older devices that have 16 G

Yes, same for me. Also a bad assumption I made: People probably have enough storage space. The number of people running around with older devices that have 16 GB of internal storage is still like 5% or so. Add 32 GB devices, probably 10%. And most of them are constantly full. Btw. the same is true of older iOS devices. They are constantly almost out of space and there is not enough free space to update to the most recent iOS version. It'd probably work with iTunes, but many people don't install iTunes. So they're stuck with iOS 10, although their device would still be capable of running iOS 13, simply because they don't have enough free space.