Setting the stage:
I developed a new site with a new domain to replace an existing domain. I want to lose the old domain altogether
and don't mind if it expires. However, I do want the old domain to point to the new domain until it does expire.
So, through the domain registrar(GoDaddy), I set a permanent 301 redirect (no mask) pointing the old domain to the new domain.
Works perfectly and seamlessly.
My question is: Having set the 301 redirect to the new domain, will the old domain soon disappear from search engines?
Will it be UN-indexed? If not, why not? If so, about how long before it disappears?
Hoping many will weigh-in on this question.