Comment by Telaneo

Bear in mind that in Denmark, all government mail goes through Digital Post.[1] Once you remove government letters and bills (as that's also digitised unless you really feel like paying extra to do it the old-fashioned way) from your postal system, there's not a whole lot left for the postal system to survive on other than packages and physical spam mail. Letters become a very low priority, since it's not like there's a tremendous amount of business correspondence or personal letters and postcards propping up the system either.

I'd imagine any other country where even the government isn't going/obligated to send you physical mail will eventually go down the same path. No point in propping up the system if even the government doesn't have a central use of it.

[1] https://lifeindenmark.borger.dk/apps-and-digital-services/Di...