Here’s another example of how an unexpected change can affect a photographic subject for many years.
There is a great water wheel at Cable Mill in Cades Cove in the Smokies. It had been quite photogenic, especially with its thick coating of moss. Here’s an image of the wheel made in April 2014.

Cades Cove Grist Mill with moss. (Made 04/30/14 with Nikon 70-200mm f/2.8 lens at 85mm on Nikon D800E.)

Cades Cove Grist Mill with new moss-free boards. (Made 05/03/18 with ZEISS Otus 85mm f/1.4 on Nikon D850.)
If you make an image, you can always make a better one later if the light, the conditions, or your equipment are better. If the subject later changes or is gone, you’ll always regret not having made the image when you first saw it. Shoot it now.
©2018 Tom Vadnais Photography. All Rights Reserved.