ok reuben because you obviously do not get sarcasm let me spell this out for you:
those are all stupid and useless features that ultimatly aren't that helpful or useful and would detract from the posts. i mean, yeah, sure, it's kind of interesting at first but the novelity wears off pretty fucking quickly and then it's just another obnovious button that you have to look at.
it's the same reason we don't have karma, or a like button, or a sundae button.