I can’t remember ever having something I mailed not get to its destination, or something I expected to receive not being delivered. That includes USPS and the private carriers.
It’s a regional thing.
If you look around the internet there are a lot of people with horror stories about the USPS, UPS, and FedEx that just don’t exist where I am.
Since the “pandemic” began, there have been more deliveries showing up a day late than previously, but the packages always make it here. Nothing is ever stolen or disappears.
Living in a rural area probably helps, versus an apartment building in a city. When they drop packages inside the door of our garage they stay there. Nobody sees them or knows they’re there until we get home.