I know someone who last had a psychotic episode 25yrs ago. They were diagnosed with BP1 and put on meds at the time. Very compliant. Has always worked. Has happily worked in the same job for last 10yrs. Married. So stable in fact that in 2014 after 7 years of continuous stability, pdoc trialled cutting back on meds = manic episode (no psychosis) =first hospitalisation in ages. Meds were increased and the person is back to normal. And they still talk about their psychotic episode.