I figure it balances out the people who are extremely critical of nuclear power and accept that there could actually have been a 5 megaton explosion.
I'm not a strong advocate of nuclear power myself, but I tend to discount the value of Chernobyl as an argument for/against nuclear power. It was a terrible design in addition to being old, had little in the way of containment, and the games the operators were playing with the plant were off-the-charts stupid. Compared even to the oldest commercial Western-design reactors, it is a horrid contraption.