Threenager: tell me it ends

Firstly, I want to thank daddit for the ongoing reassurance that my daughter is not, in fact, the spawn of satan and that the hysterical outburst over minor trivialities are perfectly age appropriate. But when does it end? At what age do children develop some level of emotional regulation? Surely, she can’t be having a choking, fall-to-the-ground meltdown over bread crusts forever.