I think it's mostly not needed, but there are a lot of edge cases or narrow situations where it's important. They could be fixed, but no one is doing that. IM

I think it's mostly not needed, but there are a lot of edge cases or narrow situations where it's important. They could be fixed, but no one is doing that. IMO, a better option is to switch to 3 days/week delivery, and where addresses are very spread out, require centralized boxes.