Ken Jennings has not only survived an extended trial period as guest host but has thrived and demonstrated his talent. 

As the Jeopardy GOAT (Greatest Of All Time) he is uniquely qualified to manage the intricacies of the game.

His bedside manner captures the best qualities of his predecessor Alex Trebeck while adding his own personal flair.

In short, there is no reason to continue searching for the permanent Jeopardy host. Ken Jennings is the obvious heir to the throne.