Warning: If you turn off iCloud Photo Library in iOS, you may unintentionally delete optimized images

I would never claim iCloud Photo Library is easy to understand. Among the most-asked questions to Mac 911 are those relating to how the sync-and-central-storage system for images and video works.Macworld reader Keiti seems to have run afoul of how iCloud Photo Library manages images and videos, and may have missed a prompt that explained what was about to happen.Keiti writes:
My iCloud storage was full and I did not purchase any extra storage. In order not to get the notifications, I decided to