This is a 1000 years old church that has hosted France's history, not a company office in Manhattan.
Entirely just to do something different? Or for any actual reason?
I mean things like: https://edition.cnn.com/style/article/france-notre-dame-gree...
are just outright plain ugly due to many reasons and this is one of the nicer looking alternative proposals that I could find.
By that standard other Europeans are even more conservative.. Germans rebuilt the Dresden Cathedral and palaces despite them being a complete ruin for decades. The Polish rebuilt Warsaw, Gdansk and I assume other cities almost entirely from scratch pretty much as replicas of their pre-war state.
What does that say about them?
part of the reason was to have it ready for the olympics since a design competition would take a long time.
The Sagrada Familia, which is nearly complete.
What an effort that must have been! Convincing people that their ancestors could be extracted from the ground and stored as skeletons in caves underground. What a massive amount of land that must have freed up!
Their most ancient existence is as stone carries, the storage of bones only started late, in the XVIIIth century.
They never really held big significance for Parisians.
Source: https://fr.m.wikipedia.org/wiki/Carri%C3%A8res_souterraines_...
Major conservative donors blocked any attempt of modernization of Notre Dame. They insisted on reusing lead for the roofing. Highly inflammable wood for the hidden frame.
There are countless examples of old buildings being retrofitted with a modern one, and it rarely works well. You usually end up with this kind of cyberpunk Borg look of old tech merging with new tech, with some futuristic augmentation sticking out like a sore thumb rather than blending in organically.
Of course, maybe someone could have come up with something that would have worked, if given time. The one design submission I quite liked was Vincent Callebaut's faceted glass roof and spire, but the other submissions were not great.
The Sagrada Familia is church built completely from scratch, so it's not really a fair comparison. It's also not a modern design; Gaudi was pretty unique even in his time, but design was ultimately a product of a particular age.