"Politicians, ugly buildings, and whores all get respectable if they last long enough" -Noah Cross, Chinatown
In any event, the Government Services Building down the street is a much bigger problem IMO. That thing kills an entire city block that should be vibrant and filled with store fronts and density. I'll be more than happy to do yeoman's work telling anyone who misses it that it was a monstrosity that choked the life out of the city and needed to be destroyed so the area could thrive again. If people want to see a mid century masterpiece wander over to the Christian Science Plaza and take that in. The city doesn't need to be a living exhibit of the disasterpiece examples too.
I don't agree that's a pendulum example. I think with NIMBYs in Boston neighborhoods and surrounding towns we're dealing with similar fear of change, cities, and the people who live in them. The residents trying to protect their neighborhoods from development got theirs and they don't want to allow the area to adapt and change to a Boston area that needs more and denser housing and an expansion of the urban core. Don't forget that the destruction of the West End was designed to displace the poorer West End neighborhood with a bunch of uninviting tower in a park residences for wealthier people. There's no doubt in my mind that there is generally an undercurrent of the strong and wealthy punching down on the poor and weak in NIMBYism, just like there was with mid-century urban renewal.