I use a unique email for every single service I sign up to. I’m that paranoid too, but privacy and cyber security are a very important things!

If AnonAddy goes out of business, I can just take my domain, and all my aliases, to another service, such as SimpleLogin for example.

How can you do that? I have hundreds of aliases, but they are all with SimpleLogin domains, if they’ll ever go out of business (good thing that they are part of the Proton galaxy now!) I’ll loose all of my accounts.