Where do the children play?

As a parent, I relate to all this. Great piece.

When the kids were babies we had the standard debate of move to the countryside for fresh air and gambolling in the fields etc. But so glad we stayed in London, the kids have so much freedom with public transport they can organise their own meet ups and activities and go running around all over town without any parental assistance or intervention at all. Whereas elsewhere we'd need to drive them everywhere, they'd be stuck at home way more, they'd have no real agency in their lives - I grew up like that and hated it.

You're more thinking suburban, or super rural. I grew up in a rural Welsh town (~3000 people), and was is walking distance of basically everyone we knew. I walked to school, to the pool, to the shops, my friends, everything.

Rural in Wales is not like rural in most of North America.