Well that's a surprise- others here feel the same way that I do about the "Reply to_____" button.
Specifically my issue is with the multiple "requotes". One reply is OK but it's confusing (to me) trying to follow the multiple posts by multiple participants and having to scroll to read the damn thing.
I think the feature was added due to some people indicating that other sites have a different way of presenting discussions- that they couldn't follow a conversation when other, unrelated discussions appeared between posts on a topic they had a an interest in.
Personally I only had an issue when someone responded to a post that I couldn't read and I sometimes thought the response was to something else.
Which often led to some humorous exchanges by others in the same canoe.