My side hustle client pays only by paper check. I've taken to billing them bimonthly just to cut down on the paper (they're annoying about waiting until the last minute and then expecting me to get things done fast, but they're entirely reliable about paying up).
I do still get several bills in the mail; local utilities aren't available online out here in the sticks. I also just put cellular back on paper; if AT&T won't actually send an electronic bill, they can just pay for a stamp. We haven't gotten our push ebill as we are supposed to in months; I've had to call or log in to their website at about bill time every month to check.
Other than that, mail is mostly crap, but we do get a limited amount of crap, mostly the advertisement circulars that go to everyone in the area and the occasional offer for a personal loan at usurious rates. That's one advantage of a post office box; junk mail never even leaves the post office -- straight to the trash can there.
Oh, I did get an unpleasant bit of mail recently; apparently one of our land parcels, the unbuildable one, mysteriously doubled in value this year so that the county can collect more taxes. It looks like my appeal won't be a problem, though, and talking to the folks in the office to set up the appeal has clarified how to get a conservation easement on our whole property, both parcels, so it's a win for us (and the trees) and a big loss for the tax man.
The point is to manage the bills and the mail rather than letting them manage you. How to do that depends on your circumstances.