Asus ROG x670e Extreme RSVD SWITCH

On my X670E Extreme I noticed after a month of use that I had the RSVD Switch set to ON from factory, but in the manual it is clearly written that it MUST be set to OFF otherwise the system could be damaged.

Now it is in the correct position, but I 'd like to know if it could have done any damage since I've also updated BIOS a couple of times with that switch set to on...