@C-Beats Thank you so much for the quick response. Respectfully, I dont think thats the question the OP and I are asking, or I am not fully understanding your response.
So the per platform settings do save, but.... if a new theme comes out we apply it as main theme, then boom those per platform/custom platform saves are wiped. Now, I understand that I can go back and recover that from the backup folder instantly but lets say I decide I want to return to those "custom" settings a week later, and I have painstakingly added some MSDOS games I found in my "attic"... either that backup with my custom platform settings are wiped from due to the system backup methodology or, I save the backup files static somewhere and now my new adds are not included.
Thanks in advance for your time. Some of us are as indecisive as 8 year old kids looking at a menu with too many options. Just wanting to find a way to properly be able to revert back to that custom platform subset without losing other aspects, or work performed.