A news article talking about George Hotz's original PS3 hack was released January 25, 2010. The PS3 software update that removed OtherOS was released April 1, 2010.
As I recall, ultimately Hotz managed to compromise the device's root key, and Sony determined that it was impossible to protect the key (after replacing it) as long as OtherOS continued to exist.
As I recall, ultimately Hotz managed to compromise the device's root key, and Sony determined that it was impossible to protect the key (after replacing it) as long as OtherOS continued to exist.