So I know what happens when you don't know someone on the inside: you are out of luck. You lose important emails, photos, notifications, bills. You have to change a lot of your other accounts. No fun at all.
Wait...you want to know the worst? That's the email I used for coinbase that I think still has a few Bitcoin in it. I can't log into coinbase because I don't have the same phone with the same phone number for Authy, and the recovery email is the hotmail email I am locked out of. Of course I have open support tickets with coinbase bu you can imagine that I'm not exactly real high in their priority queue. So being locked out of my email has cost me a lot of money in the long run.