Often there are times when I would like to reply to a post but don’t have time or don’t have a complete reply in mind at the moment. So it’s the Like icon or nothing. But if the post contains nothing new to me, I would hesitate to say Like, but might just want to say Agree, GP(good post), GFFT(good food for thought). In a drop down menu other choices could be Disagree, MDP(more details please), CQ(confusing question),
GI(Google it), DU(don’t understand your question), TI(thanks for the idea)…