I'm still on a dumb phone and that's because I think spending $800 on a phone is ridiculous. And it's not like I can't afford it.
And there are plenty of reasonable smart phones for less than £100 these days. You can get something like a Motorola E13 for under £70 that will do everything most people use their phones for well (beyond the camera being nothing special, but we're comparing to a dumb phone).
I rarely drive so my car is 19 years old.
I use my phone daily (right now!) so I have the newest one.
Phones are appliances that are being used up to 10 hours every single day. And sure you can keep repairing them but at some point buying a new one will actually be cheaper.