How long ago does everyone reckon the age of King Grayskull and He-Ro was in relation to the present day? Was it five hundred years, making them the equivalent of early modern monarchs from a period of clear recorded history? Was it five thousand, making them more like the equivalent of Gilgamesh? Or was it an even greater span of time?

The various characters who've been around all the time since in recent Motu fiction (Zodak, Moss Man, Sharella/the Goddess) would suggest a relatively short period of time but the age of Castle Grayskull, the transformation of the landscape and the disappearance of the cyborg dinosaurs would suggest rather longer. So which of the various takes is it?