Navigation is the one area I agree has benefit, although there are some not sucky offline navigation apps. They’d be better if Maps hadn’t dominated the market and knocked the motivation out of everyone else. Modern CPUs are more than capable of planning routes, and modern storage more than big enough to hold several states worth of roadmap data; there’s no fundamental reason other than user tracking for nav being offloaded to servers.

Personally, I never stream music; if I’m going to pay for it, I want to own it, not just rent it. My phone’s a couple of years old and has 256GB - more than enough for all of the music I listen to.