Instead of getting any more powerful, when you level up, your character just gets a more and more overblown title.

Eventually you are the Sorcerer Whose Coming Is Foretold, Master of All Arcane Things, Bringer of Life And Death Alike, Weaver Of The Subtle Energies And Slayer Of Dragons And Demons, still with only 2 first-level spells and a +2 proficiency bonus.