I don't think that things have significantly changed in most towns and neighbourhoods. Things are actually safer now, especially since it's now conveniently cheap for everyone to give their kids a phone, so not only can you child ring you, you can also keep an eye on their location.

For the past 20 years, the media has been pushing this narrative that your children are going to get kidnapped, raped, and/or murdered if you leave them out of your sight. Fear sells newspapers.

Those towns exist all over, but I agree suburbia for our generation is not as attractive for other reasons.

Personally, I want to raise our son in a suburb and my wife doesn't. I do because my childhood was great in suburbia but there are major family and career trade-offs to do so.