Nobody under like 40 uses email for personal communication.
Yeah it's a legacy medium for stuff like your bank, maybe it's the least terrible option for B2B communication, but email has largely been replaced already.
It's the default: you need an email to make all those other accounts. Everyone has an email (assuming they have internet at all). Not everyone has a goofacetwat account, or whatever the newest thing is.
Nobody under like 40 uses email for personal communication.
Yeah it's a legacy medium for stuff like your bank, maybe it's the least terrible option for B2B communication, but email has largely been replaced already.