that's kind of the point with modern architecture. It's at best lame, often outright ugly from day one, and aways never age well. The only merit is that it is made of non-durable materials (concrete, glass and steel), so no one will look down on our civilisation in 800 years since there will be nothing left.

https://www.demilked.com/notre-dame-reconstruction-designs/

?

Because they are actually.. quite revolting. Even by modern standards, pretty disgusting. At that point you might just as well just bulldoze the whole building and put something new entirely there.