I'm another user who would absolutely prefer the option to always Save History.... Didn't want to start a new topic and clutter up the forum; there doesn't appear to be an "upvote" type feature here, so I'm just adding my support for that option.
I am not sure why saving history with the document is a decision that needs to be remembered by me every single time I save my projects.
I always save my history, because I’ll inevitably go back and make some changes later. I like to see what edits I’ve already done, and sometimes I just need to redo things.
Regardless of the why, it would be very helpful if, in the General Preferences, you could add a permanent option to save history with documents.
Three options—Always, Never, Prompt/Ask When Saving—would suffice.
It is always deflating when I open an afphoto file that I’ve worked on but forgotten to Save History with document.
Please and thank you.