[arbfay]

The only valid argument I see is that some brutalist buildings are historically important and even we don't like them today we should keep some of them for future generations to visit and see what we have tried, and disliked.

But to use the environment as an excuse is silly. There are always things that can be done for that: recycling the concrete, rebuild to reduce car dependency and improve energy efficiency, choose more sustainaible materials (like wood) that can easily be replaced in the future (instead of more concrete), etc

[quantified]

The sunk cost of carbon, sand, etc in the concrete and construction would be sad to throw away.

[anon373839]

Making people live or work around those depressing monstrosities is even sadder.

[philwelch]

I understand wanting to leave a few of them as warnings to future generations, but i think the the surviving WWII-era bunkers and flak towers in mainland Europe capture the same basic style and are enough of a representative sample.