> So how did the like button come about? What problem were you trying to solve? I was trying to solve what we called the redundant problem. So for example, if you write "We're getting married!" all the comments used to say "Congratulations" over and over again. I found that really aesthetically ugly, plus, every time someone did say something heartfelt, the post was hard to find among all the other redundant ones. [0]
I find a similar situation on YouTube, where commenters don't add any insight or discussion to the video, they just say something like, "Great job!" or "Beautiful music!". Not a problem in itself, but when you have hundreds or thousands of these comments it leaves out real room for critique, questions, etc.
GitHub has a similar feature with reactions to issues.
However, one small concern I have is that such reactions might "dumb down" user/viewer participation and give the impression that using a reaction is all you need to do to have an opinion. Real discourse requires thought and reason, and not just slapping an emotional sticker on something.
[0] https://www.vice.com/en_ca/article/mbag3a/the-inventor-of-th...
It wouldn't allow for great conversations, but I like the idea that I could write a blog post, go to this site, pick a couple of thesis statements that basically sum up my article, and plug them into the bottom of my post. When people reply, they'd need to reply to those arguments and use the conventions that the site establishes.