In his case, motion blur given live subjects would be a common problem, resulting in trashing two-thirds of the photos. With a modern camera and sensitive file

In his case, motion blur given live subjects would be a common problem, resulting in trashing two-thirds of the photos. With a modern camera and sensitive file or sensors, you can shoot at much faster shutter speeds for the same amount of light. On a given shoot, I may take 250-500 shots of which, unless I screw up, almost all are technically fine (correct exposure and focus) but only a handful turn out to be keepers for aesthetic reasons. But then, I shoot mostly landscapes which tend not to move around too much.