Probably less than 1% of browser users have any idea what IRC or SMTP are. For your average user chat is whatever FAANG puts on their device / screen and email

Probably less than 1% of browser users have any idea what IRC or SMTP are. For your average user chat is whatever FAANG puts on their device / screen and email is whatever address one of the several services you signed up for when getting Internet gave you. The Internet is considered broken by Mozilla because corporate centralization has turned the web experience into at most a dozen websites per user down from the potential infinity of domains possible.