Haven't had a chance to watch the videos, so maybe this has been answered... I see 'added' and 'last updated' columns on content - do you keep historical versi

Haven't had a chance to watch the videos, so maybe this has been answered... I see 'added' and 'last updated' columns on content - do you keep historical versions or update in place? If you only update in place, then the content can break or change for any number of reasons. Even if it's only configurable, I'd rather use the extra space (text is tiny anyways) to store the history (with an infrequent update schedule).