"What is coming under acute threat is a particular subset of modern architecture: significant buildings designed in the 1960s and 1970s, just as the movement was losing its supreme, heavy-footed global influence and splintering into a number of competing factions. The Astrodome was completed in 1965 and Prentice in 1975. Rudolph’s Orange County Government Center in New York state, which has so far survived a serious demolition threat, opened in 1970.
What is it about late-modern designs that has left them so vulnerable in recent years? In part it’s simple arithmetic. Works of architecture tend to fall out of fashion beginning around age 25 and hit their deepest levels of disfavor between 40 and 50 years old. This is largely true regardless of architectural style or historical period. Buildings, it turns out, experience their own version of a midlife crisis.”