> Like all good nerds, I generate a unique email address for every service I sign up to. This has several advantages - it allows me to see if a message is legitimately from a service, if a service is hacked the hackers can't go credential stuffing, and I instantly know who leaked my address.

I think a lot of services will "de-alias" the email addresses from these tricks to prevent alts, account spam, and to still target the "real" account holder email. So the old tricks like "<name>+<website>@<host.com>" is not considered a unique email from "<name>@<host.com>". Unless your site-specific emails are completely new inbox aliases, then I don't think this is as effective as people think it is anymore.