My usual response to this is "keep it, but turn it into / put it in a museum". However, that seems impractical here. .su can't go in a museum any more than pi can go in a museum.

It could be a museum, but it would by nature be the only one of its kind on this topic -- so, who would get to decide what goes in the museum? The history there is too recent and too global to really find an impartial administrator anywhere.