I had an old domain that I have deprecated, but 301 redirected all results from it to my new site.
The new site is now receiving a decent amount of traffic, but I don't know if it's 301 redirected from the old site, and doing a
site:[old site] still shows several thousand pages indexed.
Since all pages from the old site are 301 redirected, will they ever be removed from the index, as long as the old domain name is active?
As a rule of thumb, somewhere I got 90 days for any significant site changes.
When is it safe to burn the old domain?