alt Hacker NewsCan you cite an example of a big, well-known, etc service that enforces a 'you can't change your email address' rule? I haven't really seen this sort of thing in the wild to be honest. Maybe one or two over 20+ years? I think the norm is using a username or an internal identification number (such as an UUID). It is rare the email address is actually used as the primary key to identify an account.
> Can you cite an example of a big, well-known, etc service that enforces a 'you can't change your email address' rule?
Philips Hue.
I've run into others, but that one sticks out because it's the only account I still have using my old email, since creating a new account would also involve re-pairing all of my Hue products.