As you knowA 410 httpHTTP header means the deleted content is gone forever.
When I remove a page from my website, I never put it back and it is gone forever.
I want googleGoogle to index nothing other than the existing pages in my website.
So what is the downside of using 410 instead of 404 httpHTTP header for ? As I see, itIt is not a common practice so I expect that there can beis some kind of disadvantage or harm in doing so.