Good questions, and thanks for asking them. I’ll try to answer each one:

--Who writes letters anymore? Hardly anybody. --Who gets their checks by mail? Many poor people who don’t have bank accounts. And many old people also get their medications delivered through the mail. -- Who gets bills by mail? Mostly rural people, a few of whom I know. --What percentage of your mail is "junk?" Much of it, but this is not the fault of the Postal Service. The same companies that send people paper junk mail can send junk in email. This would be something to do to save trees: Stop all the paper junk mail.

--Basically, usage of the post office has changed because of online banking, email, texting, and electriconic paycheck deposits. True. And if Elon Musk has his way, everybody will eventually have access to the Internet through satellite, for $599 setup cost plus $110 monthly subscription fee.. But it would be good if the Postal Service offered internet access to people at post office locations. who cannot afford to pay Musk through an online capability at the post office.

--Right now, a large percentage of "mail" comes from online purchasing, and overload handling for companies like Fedex and UPS. True. I’m rural, and almost everything I order online is delivered to my local post office.

--Income streams for the post office have changed drastically over the years, and even with quasi-monopolistic status, the post office has and will continue to struggle. Probably not if it is allowed to offer banking services (which it did at one time) and other services, some of which I’ve listed. Keep in mind that the Postal Service would not now be struggling financially were it not for the requirement to pre-fund retirement benefits for 75 years and not being allowed to offer additional services.

--It has nothing to do with the government, but rather consumer behavoir shifting. This is not going to change, it will continue to evolve (Amazon is experimenting with other methods of delivering their packages, and will eventually figure it out.) --Again, true. Maybe. Eventually. Drone delivery? There will be a lot of drones shot right out of the sky with all those guns people are allowed to carry. Additionally, the other methods Amazon comes up with might be subbed out to the Postal Service.

--Political parties have nothing to do with consumer preferences and citizen behavoir - other than manipulating (Trump) and buying (Biden) votes. Political parties these days seem to have a whole lot to do with citizen behavior. But I don’t understand the relevance of this: It is the Republican Party and Republican bigwigs who have tried for years to gut the Postal Service so they can privatize it, pay workers lower wages, pay CEOs more and reduce service yo area that bring in less profit.

--Final question: what is the price tag for the American taxpyer to "save" the post office? I think zero, except perhaps for having to return to the Postal Service the amounts that have essentially been stolen from it. From my research, it would appear that the Postal Service would be profitable without the pre-funding requirement. People are yelling at each other about the Amazon contract, and it is true that Amazon is not paying as much to the Postal Service as it would have to pay for other end-point package handling. But the amount Amazon is paying makes it profitable for the Postal Service to do that handling.