It's an interesting discussion in general... I've lived in 5 states in the US and mail service isn't necessarily the same across all of them even among similar types of neighborhoods...

For example, in Georgia it's common for every house on a rural residential dirt road to have its own individual (non-lockable) USPS mailbox at the end of their dirt driveway.

In Colorado, on the other hand, it's not uncommon for many of those similar rural dirt road neighborhoods to have a communal (locking) mailbox at the entrance to the dirt road neighborhood similar to what most apartment complexes have.

It's also not uncommon in Colorado or even California for some suburban single family home neighborhoods to have similar communal (lockable) mailboxes but that's less common, in my experience, in most Southeastern states.

I've also lived in an old Victorian building with a mail slot but it had been converted to apartments and had a multi unit locking mailbox bolted to the front of the building at that point.

I don't remember if I had a point or not now other than that shit is weird.