I mean as long as you can still set your email-number to whatever you want and update it if you want to drop the old one.

I feel like there's also implications for spam, like you want to target X demographic, all you have to do is try numbers with common name combinations from various cultures. Like in Nathan For You when he made a targeted billboard for a psychic that said "Maria Garcia, I had a dream about you" so all the Maria Garcias who saw the sign would become potential customers.