My first manic episode was in my 40s and I have found that the degree of psychosis has gotten worse for each one. That is why I am now in my mid 50s on a daily antipsychotic. It has been a year and a half since I had a break with reality. So far so good. It is true the energy level goes down with age but that doesn't mean the intensity of the episode does.
That is only my experience and I would imagine others have had different ones.