Agreed, because when I hit "reply", I sometimes write something, then want to reference the parent post (especially on a Ask HN post), and have to copy my text,

Agreed, because when I hit "reply", I sometimes write something, then want to reference the parent post (especially on a Ask HN post), and have to copy my text, go back, read, re-find the comment, reply again, paste. Yucko. Just a link to the parent that I can center-click to open in a new tab would be an improvement.