How to reply to answers?
If someone replies to a question, that shows up in the stats on the main page and bumps the question to the top of the list.
So how should we comment on that answer so that the same thing happens? AFAICS, commenting does nothing to move the question to the top of the list, so if you have a follow-up question, no one can tell.
Comments most certainly do not move questions to the top of the list, leaving those with further questions to either edit their original questions (as I am currently doing) or "answer" their original question with another question.
Here I am adding a follow-up question to Eric's comment: how is this easier to read than a back and forth within the comments? (Answer: it isn't)