Like many people I have around a dozen email addresses that are unique to me and several that are shared with others for various reasons. I have found a reason

Like many people I have around a dozen email addresses that are unique to me and several that are shared with others for various reasons. I have found a reasonable number of systems that just let me update my email address if desired but some, as the article notes that cannot easily be changed. I am also a fan of name+stuff@example.com email addresses where I need a bunch of accounts, usually for testing (although a surprising number of sites treat the plus sign as an illegal character).