I have an obsolete (with Lineage OS installed) Samsung smartphone with an SD-card. I use it for podcasts and audio books, as it has a jack, and I have a nice non-Bluetooth headphones that I wear most of the time of that listening time. I like to think my internal storage isn’t wearing over and over again, but the SD card, which I can super easily replace any time. Plus, I can replace it with something huge (like extra 128 GB or even more, what is supported) for very cheap. I cannot add extra 128 GB of storage to my iPhone, even if I’m willing to pay the premium. I have just one way: to sell my unit and buy another with more storage.