Earlier quoted context omitted.
My advice - just rip the bandaid off and do it. I had anticipated taking a whole weekend to update the email address on all my accounts, but it was a lot less painful than I had anticipated. Changing over ~50 accounts took me about 3 hours all told. Most services allowed me to change my email even if it used email as the “username.” Using a password manager made this much easier, as I could easily keep track of which…
Mind sharing why you choose Fastmail over alternatives?
Also the web app is really good. Like really really good. And I don't normally like web apps.