Constant exposure to novelty. The brain is an adaptive organ and subjecting it to repetition and normalcy actively prevents any adaptation from taking place. Living in the same place, doing the same thing, experiencing the same things, being with the same people, never having intense new experiences provide markedly fewer novel stimuli which are what fundamentally drive all brain development.

The desire to sit still in the same room for decades on end, experiencing nothing interesting or pleasurable or intense, is a desire for a brain that stops its functioning.