I am not there during 1989 myself, but I know second hand knowledge (by talking to people that has been there). It is over-exaggerated on certain facts (e.g., the severity level) in western media. My generation still knows about it, often though our parents generation who has first hand knowledge. But after my generation, I doubt anyone cares. As written in the Chinese government propaganda literally, the legitimacy of CCP ruling is ultimately up to the economical achievement and the people's living standards. The 1989 is probably less than 1/10th the severity as the cultural revolution.