It would be so much easier for normal people if all service providers allowed you to add multiple email adresses or other aliases to the account.
You can easily lose access any particular email address, even if it's on your own domain. Losing access to all your email addresses and phone numbers at the same time is far less likely.
I'm not aware of any other scenario, but losing a domain is easier than you may think.
For instance, my main email address is on a domain that is now owned by my company (it wasn't originally). If I ever sell the company, I lose access to the domain as well. My wife's email address is on that domain too.
Right. Yeah I know it's not hard to lose posession of a domain. I probably misinterpreted your comment when I thought you meant losing a specific email address but not the domain as a whole.
> my main email address is on a domain that is now owned by my company
I never mix work and private. My email addresses on my company's domain are for work-related things only. If I ever sell or close the company, it doesn't matter. I own a separate domain for personal email.
That's definitely a good idea. My company sort of emerged from a personal activity and things got mixed up. If I could do it again I would handle it differently, but you know, life's twists and turns... :-)
You can easily lose access any particular email address, even if it's on your own domain. Losing access to all your email addresses and phone numbers at the same time is far less likely.