https://www.1000libraries.com/blog-posts/why-was-the-old-cincinnati-library-demolished
Not originally constructed as a library. Too hot in summer. No windows. Books would get covered in soot in winter. Flooded. Wasn’t safe for the public to even be in.
Lovely as it looks here, in historical terms 75 years old is last week. My town is demolishing a 117 year old cinema to make way for flats, and nobody gives it a second thought.