At the same time, postal rates have been steadily rising from three cents to 49 cents for one-ounce first-class mail. I can't speak for other mailing rates. I can speak to the insane increase of junk mail -- the signal-to-noise ratio in my current tiny mailbox box (smaller than a shoebox!) is so bad that I check mail twice a month. And get yelled at by the postman, when he sees me, because of my packed-full box. The junk mail doesn't make it out of the mailroom, because I don't want to carry all that stuff back to my abode to throw it into paper recycling.
"But what about bills and such?" I find that all utilities provide phone or web payment options. Indeed, I can see my bills on-line, which means I don't have to deal with the post office delivery delays. I haven't mailed a check in more than three years. Stamps? Don't use 'em; for the few things I do mail, I stop at a post office and pay cash. Partly because the rates keep changing (yes, I know about "forever" stamps) but also because my mailings tend to be bulky and require extra postage anyway.
If the post office would dry up and blow away, it would have very little impact on me.
What I did was set up a specific email account just for bills. I told the mailman that anything that looks like a mailer to toss. He said he couldn’t do that. 100 bucks last Christmas changed his attitude.
Places that do send me bills in the mail, I set up pay to accounts with my bank and every month have a notify date when I need to pay the bill. Then I send it from my bank account that is set up only for bills. Maybe I have 1-2 a month that I write a physical check for.