What if we could "like" a post and then sort the posts in the thread by likes? (or maybe call it "Agree" or "Disagree").
Many of the question topics have multiple answers and it would be easier and nicer to agree or disagree to a post then to reply to it saying "yeah this guy!"
That only works if you have a tree-like view to mitigate some of the confusion which reordering posts would generate.
If you really like a post ... reply to it.
Why? Hit "Appreciate" instead. That's more visible in that it puts an icon directly on the post, and doesn't reduce the signal to noise ratio.