Yay! The move seems to be working out for you pretty well so far, Linkat. Hope so!
By the way (just to add to what I said, not addressing anyone specifically) there are a few different elements to "death of the daytime neighborhood."
When I was talking about it most is when I had to do scheduled playdates and activities and such for sozlet because there weren't other options. When I was a kid, there were enough parents (mostly moms) at home that we could run amok even from a very young age and know that there would be an adult who would come running if anyone yelled for one (or just yelled in the wrong way, at all!)
In addition to a critical mass of parents there to step in as needed, there had to be a critical mass of kids there and available. There were probably about 25 kids in my immediate vicinity when I was growing up -- very occasionally we would all form a superpack, but more often there would be smaller pockets that would form.
With us, sozlet would go outside but there just wouldn't be anyone there at all.
It becomes a feedback loop -- enough parents are both working that they can't leave their (young) children at home during working hours, so there are fewer kids out doing things, so the ones who are at home and available start getting into scheduled activities so they have opportunities to socialize (and then they're also not part of the freerange pack).
I think it can be easy to blame parents when it's outside of their control. (Unless they want to pay every other neighbor to stay home and keep an eye out.)
Territory changes with age -- sozlet's territory when she was little was this block, and that was a wasteland. (Even in my freerange glory days I was supposed to stay on my block until I was probably 9 or so.)
Now her territory is a lot bigger, and there are a lot more eyeballs (I get unsolicited reports at intervals), in addition to her being more self-sufficient.