I read that the Cathedral is owned by the French government, and had been in horrible disrepair - with pieces of stone falling off etc. It was estimated it would cost ~$180 million to repair it, and the French government only have $50 million. The rest had to be raised. Sounds to me like it was neglected for a fairly long time. That is really sad.
When I visited Notre Dame cathedral in 1989 I was struck by all the little indications of lackadaisical care of the property. I don't mean that it showed signs of neglect, but it looked to me like it wasn't being cared for to a degree befitting its historical value and cultural status.
It just seemed to me that the French had less regard and respect for this world class treasure than I did, and I'm neither French nor Catholic.