I’ve found that the number of new comments on a post drops off considerably the older a post gets. It’s not surprising; you’ve probably seen the same thing in your own travels around the web. The older the information, the less activity, and therefore less feedback.
However running my own blog has provided me with new insight into this phenomenon. When I look at the stats for my most active posts today, the number 2 and number 3 spots are held by posts I wrote back in May and November of last year. Yet the comment counts don’t reflect the activity of these posts.
So if you find a piece of useful information, and you’ve got some feedback or insight, share it! Never question whether it will be useful. You found the information, after all.