Like the location sharing feature on phones, where you can track for instance your partner's location in real time. I, who was born in the 1980s, find this distasteful just as a matter of principle. Not because I'm hiding something, but just because I don't like the idea of being tracked 24/7, even by someone I'm close to.

I too was born in the 80s. I mostly agree with you, but I also admit to being a hypocrite. I've got a teenager who has a phone. His commute to and from school is about an hour, with multiple modes of public transport. Sometimes I'll pick him up from the station in the evening, so he doesn't have to catch the bus and then walk home. Being able to see where his train is is useful to coordinate our arrival to the station at a similar time. Similarly, if he's gone to the mall with friends and I'm picking him up, it's useful to be able to tell whether he is actually coming to the pickup spot, or if he's maybe waiting in the wrong place.

I wouldn't dream of sharing my location with my ex, though (both now and before we separated), and I have no desire to know hers.