Wow thanks a lot for your very detailed review. You're so kind and thoughtful which I already knew when I asked some questions before :) Yes, even some were mentioned before, it'll be still helpful when you need some evidence that people want a change :)

Regarding S3,

"I don't really understand this suggestion, especially because there is no way a review can be older than 3 days before it's upvoted (so it will never be close to expiring)."

That's exactly my point. postpone it further than 3 days if there're expiring contributions, but when comments are expiring, they have the highest priorities. Does this make sense?

Thank you so much again!