It's been nearly fifty years. It was a flawed experiment. He's been interviewed countless times. Why do we need yet another article about it that doesn't say anything new?
It is disingenuous to assume that because something is 'old' in your eyes, 'everyone knows it already'. This is clearly not the case - if everyone knew just how bad human beings can be when granted power, perhaps there wouldn't be such heinous conditions in the halls of power as we have today.
Fact: either we re-fresh discussing the uncomfortable truths about human existence on frequent occasions, or we end up unwittingly repeating them. Also, frequently.