David Busch's Nikon Z9/Z8 Guide to Digital Still Photography

14 Protection, Prevention, and Troubleshooting

One of the nice things about modern electronic cameras like the Z9 and Z8 is that they have fewer mechanical moving parts to fail, so they are less likely to “wear out.” No film transport mechanism, no wind lever or motor drive. You don’t even have to worry about complicated linkages from camera to lens to physically stop down the lens aperture. Instead, tiny, reliable motors are built into each autofocus lens (and you lose the use of only that lens should something fail).

Best of all, the all-electronic shutters of the Z9 and Z8 make keeping track of how many “shutter clicks” have accumulated as a measure of camera life largely irrelevant. Without the possibility of mechanical shutter failure ...