I'll extend off of your great commentary and suggest that the letter/small correspondence delivery portion of the USPS (not the parcel/package delivery segment) should be collaborating with U.S. libraries to establish more digital infrastructure for citizens; especially those who lack what others might consider the digital basics. This could include free/low cost email, local instances of ActivityPub servers, matrix (or other secure, but open source equivalent) chat services, etc. I understand this would open up many issues, and not an easy fix...but if more and more things are truly becoming more digitized, then government (and government-adjacent) services should not just evolve, but also help the citizenry evolve to take advantage of said services. At that point, i can imagine a scenario where if such a free/low cost email service were available, the likes of google and microsoft could not block digital correspondence since there would be at least some regulatory framework/policy in place to avoid such issues. Again, none of this is easy, but i feel the path forward can still leverage gov. entities - like libraris and USPS - that have greatly helped citizens in the past throughout our history.