One benefit for me that wasn’t immediately apparent is a custom email, paired with something like proton mail and simple login I turned it into a catch all.
It’s fantastic. Company asks for a email, sure. Walmart@problematicpenguin.org. Now, I can sort anything that arrives to walmart@ right into the spam box. Doesn’t matter what address they’d send it from.
Fucking. Brilliant.
You can point simple login to your exosting Gmail account, sure. Simplelogin is a paid service.