It’s not the first time that it has happened to me, and I guess it might happen to other people as well, and it’s really annoying.
When editing images in a folder, you accidentally press Command+A (instead of Command+Z). Not paying attention (because it’s been hours since you started using the software), you continue to modify the next images, until you realize that you are changing the setting of ALL the images in the folder. And more especially, the settings of the images that you have already corrected.
Then you desperately press 100 times Command + Z to cancel those actions, but there is no way to go back. You have just lost hours of work.
So, I suggest adding a Warning message when selecting all the images and changing the settings of all the images at once, like "Are you sure you want to modify all the images at once? ".
Maybe it could be triggered only if it includes images that have already been modified.
Note : Thanks to the new “history” I was able , for each images (something like 700 images), to go back in the history and select the stage before applying the last 11 modifications … but it was such as pain in the ****.