Do we really need a USPS anymore? Or at least, a USPS in its current form? No more mail carriers, no more paper letters. Packages handled by the private secto

Do we really need a USPS anymore? Or at least, a USPS in its current form? No more mail carriers, no more paper letters. Packages handled by the private sector. And digitized mailboxes for every person. Something like: john.smith.uniqueid@uspsmailbox.com? Why aren’t we doing this already? Are any countries doing this?