I’m one of that age group and my voices are now barely there. But the negative symptoms and cognitive decline is definitely happening. I find it more difficult to simply read a book, and I often have little to say and stare at the wall. I still struggle with obesity and although I’ve knocked my a1c down considerably it is still high in the pre-diabetic column at 6.3. (at one point it reached 6.9). I am at a group home, unemployed, and have little desire for sex, or a relationship. My aging Mother is making one last attempt to save me by paying for gym membership but I know that when something happens to her that’s it. (I would have extreme difficulty getting there on my own, or paying for it.) It’s kinda of a relief to have fewer voices but it’s like they are not necessary any more. I am more or less destroyed and their mission is accomplished.
I have little to say F2F because I don’t do very much/have a rather limited amount of things I do.I’m well aware that the things I do are going to bore the pants off the average person. Cognitively I’m holding my own. Can identify with the being obese/unemployed/little desire for sex and a relationship.
I suggest that people with Sz beyond fifty should do some exercise such as taking a walk everyday and keep a good hygiene.
you know, a lot of people die of cancer before fifty.
I’m 62 and still going. I’m not experiencing psychosis, but I take 15mg Abilify.
I’m 61 and thankfully my weight is normal, most of my positive symptoms are gone, and all of my mood symptoms are gone.
My negative symptoms are still there but are vastly improving. My memory is just terrible and getting worse by the year.
My body has gotten much weaker just over the past year. Especially my legs.
I have zero interest in sex, romance, relationships or even friendships. I’m perfectly happy and content though thankyou 
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From my humble point of view
Schizophrenia Whole condition is the hallucination itself ,not any diagnosed symptoms whatever they are !
the real cause of suffering that calls SZ represents in the existential properties structure of the thing called Hallucination.
IT is stable structure over the years !
The severity of its impact on both the biological /psychological side Has been reduced with the passage of time in the presence of an actual self will to practice all behavior activities to enjoy the life above any consideration !
Fifty and beyond
After all these years and treating everything be called symptoms of sz with all available therapeutic means ,and their disappearance or reduction in its severity to the point of neglecting any effect of it on the pathway of thinking ,emotion and behavior responses
But the only thing (Hallucination) of this suffering that keeps its basic position in the person’s nature without any change,we must understand that the hallucination is the real cause that is not affected by the medication or any available therapeutic measure
This thing (hallucination) in fact,it was not a Symptom of the sz condition,but rather it is the mother case itself which representing the basic structure that its activates induces a sudden change in the wakefulness period time in the basic nature of the human host,which leads to malicious modification in the products of the person’s mental activity,imbalance of brain chemistry and forms of internal suffering and the bad side symptoms output that appear on the surface to the eyes of the observers and are diagnosed as a symptoms of a condition be called schizophrenia
Therefor,the actual condition that the person suffers from is the hallucination not the condition be called schizophrenia or any of its symptoms