I do think
@aha2940 has a valid point.
If it could behave on the MVS like on the AES by
1-copying the settings to the SD on change and subsequently saving them to the Backup RAM for usage
2-and copying the settings to the Backup RAM on boot for usage
It will have 2 nice advantages:
1-One would immediately be alarmed in having to change the battery when the settings do not match what is saved on the SD (The Multi cart could even put a message onscreen stating this)
2-In case of the above the settings are still maintained and after swapping in a new battery you don't have to redo your preferred settings.