I’ve noticed that almost all WICG threads end without conclusion, as is typical of mailing list threads, but in many cases the suggestion or proposal is taken forward into a repo or other forum. Would it be useful to post a final message to inactive threads and then lock them to further comments?
For example, Content Performance Policy describes Content performance policy, and ends without resolution, but CPP is now superceded by the Feature Policy API, I believe, so it would be valuable to future searchers for such threads to have a resolution.
Sometimes such a message is posted, eg. Proposal for a Web Background Sync API - but to avoid that message disappearing as the thread continues, the thread could be locked at that point.