The better question is why would you NOT want to update to the current version?
As @Frank071 pointed out, there are legal considerations, too. In the unlikely event that you cause an accident that triggers a lawsuit or court proceeding, do you...
I proudly served in the Navy and had my last year during the Gulf War, received a medal of commendation for finding a crack in a tail rotor blade that was missed earlier that day while parked in the stack. The pilots and aircrew were sitting in...