So 20 years of internet, the rise of mobile and hi-speed connectivity, the multiplication of communications means including emails, chats, text and social network and the paper mail is still here.

I still receive all my most important communications through the mail box, including anything related to administration, voting, my landlord, invitations to major life events, bank details, etc.

Now if you hope to kill email, you gonna have to remember that.

Well, I think some of this can attributed to personal preference. Each of the use cases you described can be accomplished via e-mail or other electronic communications. Other than a wedding invite or two every year, I receive no other personal mail. This didn't require any special technical skills, many organizations actually encourage you to setup paperless accounting when you sign up for a new account.