As a heuristic, I look at the commit dates to see if it's still being maintained. And lately I look at the commits themselves for evidence of AI use. Then I'll maybe do a web search for discussions to see what other people/the community has to say about it.

Gnuhealth looks like it may be dead (or at least the repo I found hasn't had a commit in many years). (Nvm, they moved to codeberg which is a positive signal, IMO).