I disagree with you the fact that people will not really care about old stuff. However, it is depend on who are you when talking about this subject. Old stuff does not just include the traditional form or appearance of physical objects (architectures, products...etc) but it also includes the philosophy, and what people believes and built onto in the past. (such as language, and Confucianism....etc)
Such discussion is huge issues in China right now, especially that China had already been through Cultural Revolutions. One example of issues is that should we abandon traditional Chinese or not? To people live in China, they no longer using traditional font; but it does not mean that traditional Chinese are no longer exist in Chinese culture. If you know that whatever you are communicate with is base on traditional Chinese characters and philosophy behind it, there is no way that you can abandon traditional font totally without erase what the philosophy of Chinese characters has built into people's mind.
Therefore, after the Chinese Cultural Revolution, and all the hard time Chinese people had been through since than. I believe that there is no way for a country to abandon old stuff, old culture, traditions, and believe... even they don't care. Because people live base on the past.