What will happen to the site after changing the main mirror if access to the old domain is lost?

Question

Domain name market

There was a need to change the domain from site.ru to the new site.com. How to do it, I know.
But it is not clear what will happen to the positions and "rating" of the site in the PS if access is lost (for example, in a year) or the registration of the old site.ru domain, to which all the backs lead, is not renewed?

Answer 1

In fact, you will lose only the link mass that refers to the old domain, and of all users who follow the old links and bookmarks