KL,
I have a community mailbox at my new house. If you get a package that is too large to fit into your regular mail box, they put it into one of about 4 larger sized compartments and put the key to that compartment in your regular mailbox. When you retrieve your package, the key remains in the lock of parcel compartment and only the postal carrier can reset the lock and remove the key. If you get a package that is too large to fit into any of the parcel mailboxes they will just bring it to your door...but not a big issue since most packages that big are usually sent by UPS or FedEx.
I did not think I was going to like the community mailbox, but it really works fine. I have actually met some of my neighbors going out to get mail...and many just drive up, check their mail when coming home from work.
I agree that I also like the Saturday delivery of mail, but it is probably not very cost effective and for the USPS. Every day of deliver cost a lot of labor and fuel for the trucks. Even the USPS executives have talked about dropping Saturday deliveries, and perhaps even Tuesday or Wednesday deliveries??
The reason why mail delivery times are so variable is that you don't often get the same mail carrier. Your normal carrier may be on vacation, sick, or is off because they worked on Saturday and already put in their 40 hours. The person filling in for your regular carrier may not know the route as well, and may walk/drive the delivery route differently? I know I get really good timely service from my regular mail carrier, but I can usually tell when she is off and the substituted is making deliveries because the mail is usually 1-2 hours later.
Things change and the Post office is no different. When I was growing up, mail was delivered to the mailbox at your front door. Later, they started moving mailboxes out to the curb which was how rural areas got mail. At my old house, the mailboxes were at the curb, but only on one side of the street so I had to go across the street to check mail, that sounded more efficient for the mail carrier to only have to drive up the street one-way? Later the post office sent out a notice that you had to put your mailbox in front of your residence, so that meant the mail carrier had to drive up and down the street to deliver mail? Now Community Mailboxes seems to be the way the Post Office is going, especially in new residential areas.
Every change will have someone who cannot accept the change. There will always be people who are handicapped and cannot walk or drive to the community mailbox to get their mail, that's where neighbors and family members can help.... Of course there will always be some who are just too lazy.
...Rich