Manson is 82 years old. An age far older than those whose murders he orchestrated.
He got 60 more decades than Sharon Tate. And 40 more decades than Leno LaBianca.
He was sentenced to death for his involvement in the Tate/LaBianca murders.. That death sentence was transmitted to life in prison. His life is up. There should be nothing done to extend his life beyond basic food/hydration/typical antibiotics. No surgery or modern life saving techniques should be used to try to extend his life.
He did not try to save the lives of those he chose to be murdered.
Of course I mean 6 more decades than Sharon Tate, and 4 more decades than LaBianca.