All of the inefficiencies of government bureaucracies. All of the bloat and corruption of public unions. All of the lowering-of-standards associated with affirmative action hiring (the US Postal Service has been artificially propping up the black middle-class for far too long)
Good. And about time. As I wrote in this post, the time for a public post office is dead. Let the private markets take care of it.
I see no reason this should take 15 years to implement. Within 15 years, there should be zero reason to even have a public postal service. Hell, we’re just about at that point now.