In theory, I guess not essential.
I wfh, dh is mostly from home but in London otherwise, and we're 15min walk from the station.
DC 1 is at Uni - I guess getting their stuff back and forth is technically their problem, not ours. Obviously we do always drive them.
DC 2 is walking distance from school. Next year, they'll be at Uni, as above, I guess we could say it was their problem to sort out the transport of their stuff to Uni & back.
Shopping can be done online.
We could get a train to local town centres, and indeed to London.
I guess we could get a cab or an ambulance to the hospital (depending on what wrong).
Only big issue we'd have is that I'm a joint carer with sibling for my non mobile, very elderly mother with high care needs, and she lives 5 miles from us and with no station nearby. So it would be cost prohibitive to go there in a cab every day or two to give my sibling respite, and hard to get there straight away when there's a problem.
In reality, our cars are quite important to us, even if not "essential ". We mostly use them to help out our children and our parents, and I'd hate not to ge able to do that.