I actually had a very similar experience! I could modify my email address in all my important accounts, and over the years a few have prevented me from doing i

I actually had a very similar experience! I could modify my email address in all my important accounts, and over the years a few have prevented me from doing it (butif they don't let you change your email address, it's generally not a good service). Which is okay, because my password manager remembers which ones those are :-).