#spillover is part of our comment moderation system for keeping other threads on-topic. It is intended as a constructive space for tangential discussions which are off-topic on other threads. This is part of our blog netiquette, which has the general goal of making it as simple as possible for commentors to find discussions focussed on topics of particular interest without entirely stifling worthwhile tangents of sorta-related or general interest. #spillover is also a space for those ongoing/endless disagreements and 101 issues that just keep on popping up.
Commentors are encouraged to respect the topic of each post and be proactive regarding inevitable thread-drift in long threads: we hope that commentors will cheerfully volunteer to take off-topic responses into #spillover so that each post’s discussion gets room to breathe and tangents can be indulged in a room of their own.