Based on this post, or my be the one before it too, your opinion is very right. I have not been actively replying to comments for a week now. This, however, is not a norm.

I the ratio of number comments done by other and replied by me is calculated for my nine months on Steemit, I'll probably be towards the top of the list of all Steemians.

This post from five days ago and this one from six days ago is where you can see comments and their replies.

Again, you are very right. What I loved about this post, though, is people replying to other comments. I didn't want to jump in just to see where it goes. I will, of course, reply to most, if not all, comments. I value your comment and thank you for doing it. :)