The state, process, or condition of being or becoming out of date
If you search for “mutt” on GitHub, Bitbucket, etc. you will find >700 repositories. There are a lot of people who thought that Mutt needed something extra.
Most of the repos contain the same features, e.g. Sidebar, Index Color. Unfortunately, each repo was created at a different time with a different version of the patch and occasionally different bug fixes.
Richard Russon (FlatCap) examined all these repos and determined what should be preserved. The results are saved in the community repo.
Searching and categorising these repos took a lot of time. It means that when a NeoMutt release is made, we can categorically say: “This is the only version you’ll need”.
Alternatively, “This NeoMutt version obsoletes this list of versions”.