Hi galligan, good night!
I am Luz, creator of the forum “ Introduce yourself” and I completely agree with your point of view. For me, I could have a “specific” forum type where the closing time depends on some factors like the last reply date or others.
For me, it could be done the way you described. There is a type of forum with a 7 day closing period for collecting feedback and other related AIPs and there is also a more general forum whose closing period is based on downtime.