Let 'The Last Supper' Decay

We can't hold on things forever. Even culture, as the most influential force in our lives, is constantly changing. Even fleeting.
Leonardo's 'The Last Supper' is in a constant state of decay. Scholars and historians are in a constant battle to preserve it, which is commendable. But it is when they go so far as to add to it, they have done the work a disservice.
Nothing is forever. Let us enjoy the work for what it is. So the previous generations had a better version, so be it. Are there not numerous works that we are privileged to have experienced. 'The Last Supper' is for anyone, but not everyone.
But I do have a suggestion: Paint a duplicate. An exact 1:1 scale replica. Use the same paints and techniques. Hang it in an adjoining room to the original. Allow us to appreciate the intent and genuine article, while we can.