Five years ago we were making a lot of new sites. Some of them are not doing so well, and a few have been closed after going to beta. While I realize that closing beta sites is not aggressive as it was in the early years, there are still some sites that are likely to be closed in the not too distant future.
Would it be possible to attempt to migrate some of the best questions to an existing site, before a beta is closed?
As a specific example ebooks is not doing well, but it has some very good questions and answer that would potentially be in scope at superuser, under the tag ebook. These Q&As have lasting value, and migrating them would be good for the larger SE community.
I was thinking that when a beta closure was undeniably going to occur; maybe some kind of email outreach to users that are still active across SE, giving a couple of weeks to instigate migrations as appropriate.