There is literally not a single sentence of "constructive feedback" in that post. Just a post being a typical HN complainer about how since it's not perfect it won't work. He did offer his thoughts on the "best cases" but he did it in the most typical dick head know-it-all way. There was nothing positive about his post when something like this is only positive. I'm shocked you come to this site for that type of comment when there are so many great comments that actually contribute and actually offer constructive feedback.