I seem to remember hearing about this but I just found it again this evening.
I use a gmail.com account alot. I have multiple accounts forwarded into it and frankly, I’ve been using this account for a long time. And I love it.
I just found a scenario where I had my main gmail.com email tied to an account (unrelated to google.. something else) I had created for a past client. I was trying to create a personal account and it was telling me the email was already used in the system.
Well, after thinking about how to create an alias or foward… I found out that gmail automatically has an “alias” account setup. Change gmail.com for googlemail.com…. and voila.