Not even listening to music in the car? That is probably my #1 phone use case by far outside of the communications functions you mentioned. I run a Navidrome server at home, and while on the go my phone can stream any music I like from the home server (so I don't need to load it in advance). In theory one might store the music on one's phone of course, but I have more music than my phone will hold and it's very nice to be able to access whatever I want to listen to at will.