This idea has been merged into another idea. To comment or vote on this idea, please visit PL-I-266 Created/updated timestamps on all entities.
It would be pretty nice to add the ability to get the publish and created date for entities that support it, for example Product, Category and Page. Not sure if unpublish date or deleted date is required but could be nice to have if there is a scenario which we can get unpublished pages.
But first publish date and created date would be nice to have at least.