This is exactly what I do.Whenever I purchase an iPhone, I purchase the maximum capacity offered at the time. I've had a 64GB iPhone 5, a 128GB 6+ and a 128GB 6s+.
So, to answer your question, if 1TB were offered as the highest capacity model, that is what I'd buy (if I were buying).
well I'm on 256GB model and I only have 58GB left due to over 100GB of tv shows/films plus optimised photos are on...so takes up more space
Or it’s time to recognize that people use their phones differently than you.If half a terabyte is filled up due to media, perhaps it's time for the user to review what needs to be kept and put the rest in the cloud or external storage. I can't see how there was any actual needing keeping a half a terabyte of media on the phone.
If the user finds themself suddenly traveling halfway around the world to take care of family in the hospital where there's no wifi and crappy cellular, the user (and the patient) would probably be grateful one has a bunch of books, Game of Thrones seasons 1-5, plus a handful of movies readily available on one's mobile device. 😉 That said, the user (and the patient) would likely appreciate having said media on a 13" iPad rather than a 6" phone. 😅If half a terabyte is filled up due to media, perhaps it's time for the user to review what needs to be kept and put the rest in the cloud or external storage. I can't see how there was any actual needing keeping a half a terabyte of media on the phone.