While I suppose it does accomplish the purpose of decreasing heat in threads, for me it's a big usability issue since what usually happens is, I would comment o

While I suppose it does accomplish the purpose of decreasing heat in threads, for me it's a big usability issue since what usually happens is, I would comment on something, then forget about it and only check back days later, at which point there are several relies to my comment. Then, at that point, if I do reply again, chances are the other person won't reply back because he has no knowledge of my reply.