I’d guess the reason this was done for comments first is that posts are much longer and more complicated, such that it’s often not clear what “agreeing” with the post even means. I think it’s plausibly a good feature for posts, but I think it makes a lot more sense for comments.
I’d guess the reason this was done for comments first is that posts are much longer and more complicated, such that it’s often not clear what “agreeing” with the post even means. I think it’s plausibly a good feature for posts, but I think it makes a lot more sense for comments.