To be fair half of the people I know can't even remember their email address or password for more than about an hour after creating it so that's exactly what they do regularly.
My sister in law is on her 11th email address in the last 3 years.
I have had my domain and email address for 25 years...
Why not? Would be a minor inconvenience for me, for example. Just enough that I switched back to my old account on my mobile after trying it with a new one (due to the name) last I switched phones. Guess it boils down to redoing my serial calendar entries and change the address at the few places where I have it as a backup. Oh, and maybe lose access to 10$ of store purchases (there's a reason it is so low).
That's from someone who has been an Android user for 13 years, which means I am not ignoring google, I am a user, just not an invested one.
My sister in law is on her 11th email address in the last 3 years.
I have had my domain and email address for 25 years...