I've found myself commenting more and more lately on some of the big meta-discussions started by whales et al that address some of the existential problems facing steem. Some of these threads can have hundreds of replies. If you click on your "replies" tab on steemit, you may find that in amongst those hundreds of replies, someone has responded to one of your comments. Clicking on the link, in most cases, seems to take you to the OP. This is ok if there are only a few comments, as you can scroll down and find your comment highlighted. But in the giant threads, this can be a pain.
Solution: Use Chainbb. There's a feature here called "inbox", which is all the replies to your comments/posts. What's great about it is that it shows the full reply, and your comment that it was in response to. And you can reply directly there from within the inbox, without having to go to the actual full thread. But you can still do that, by clicking on the link "show original", and it will take you straight to the relevant post/comment/reply.
It's a great feature that allows you to carry on a conversation/debate with someone that is far better implemented than steemit's attempt.