Maybe my schematic wasn't clear, but if you browse my hd (I didn't want to post a screen capture of the tree structure), you would see that they all fall in chronological order and always will so long as I don't make a mistake.
It might be a little labor intensive, but I just add the new years, months and days as they occur which only takes a minute or two. I'll make sure I understand your system, basically I do, and can convert to that easily enough but a little labor intensive to make the change initially. I always retain the photo numbers assigned by the camera(s).
My first camera I could instantly tell the dates and year from the photo number. The 20D (and others in that series) just assigns IMG_xxxx.CR2 (or .jpg when I was not shooting in RAW), and builds on it numerically. In my work files, I usually but not always try to assign unique mnemonic names to my finished output so I can find them a little more easily.
So many learn the hard way after losing something important, even business people.
Thank you all for your time and energy in pointing things out I never really thought about to that extent.