When do I stop playing Annie?

A little over a month ago, I became a true disciple of our Lord and Savior, and have mained almost exclusively Annie. Her power has elevated me from the depths of Gold I to Diamond IV in that time, and I feel I have learned a lot about not being a complete noob. I recognize the value in the way she forces me to actually be sentient in order to avoid being punished for my mistakes, but I have no desire to main Annie for the rest of my life (blasphemy, I know). So when should I branch out to other champions? Master? Grandmaster? Challenger? I tried looking up the Liandry Salesman's thoughts about this, but all I could find were videos of him explaining why one should play Annie, not a single one explaining when my pilgrimage through Soloqueue would be finished.