A fork having activity doesn't imply it is a publicly maintained fork that people can rally around.
Many of forks are made for personal purposes, experiments, one offs to patch bugs, to keep an eye on a project, or other reasons.
I'm thinking of the opposite of "archive" -- a setting that means "I nominate myself to become the lead repo for the community to rally around should the community be interested.
On this repo, can you tell me which fork the community moved to for this dead project?
All valid points. I do miss some sort of guidance every now and then on some repos. The most difficult bit starts when multiple forks have different features one wants to have in their own fork.
It would be awesome if there was a way on github to say "give me the upstream with this repo cherry pick, this repo cherry pick". But that might be pretty difficult to implement.