

Yeah. Maybe, in this fantasy world, you can port your address to different branches the same way you might transfer your phone number between carriers. My phone number area code reflects where I lived when I got my first phone. It does not correspond with where I currently live. The same could be true of email addresses in this scenario.
Human innovation scales up quite well. Some people were lucky enough to have a say on the design of this systems that changed the world. It’s unfortunate that they let greed erode their humanity.