Sony even managed to pre-emptively fix that last exploit a few months before it became known to the public, so users who were actively using their PS4 and allowing it to update unknowingly locked themselves out of jailbreaking before they had the chance. The prospects of jailbreaking the next gen consoles really aren't looking good given the PS4 was this much of a PITA and the Xbox One has been completely bulletproof for its entire life.