I'm over 50 and just starting in CAS shooting. My hands are certainly not as steady as once they were, nor are my eyes so good that I see so easily at 25 yards. I've hardly the experience and skill to comment, but...
I saw an article by Massad Ayoob on "trigger control." In it, he suggested that everyone's hand wavers some in holding a handgun. His concern was that in combat handgunning, you should use a very strong grip, and that strong grip often interferes with holding the gun as steady as possible (a little different from age-induced wavering). He recommended you accept wavering, and use trigger control to achieve accuracy instead. He suggested that accuracy is based not on holding the sights dead on target, but knowing when to (and how to) pull the trigger. Ship's gunners on tall masted warships used guns that waved up and down considerably more than my own hands do, and are said to have waited to fire till they were on the "uproll" to achieve a hit. I think Ayoob was suggesting we apply the same thinking to our shooting to overcome the wavering of our sights in handgunning.
I get that there's probably a difference in the degree to which Mr. Ayoob's hand wavers and what I experience, and maybe my shaking is less predictable than rolling of ocean waves. But I'm still encouraged to think that hand wavering seems only to be part of the equation that results in accuracy. Perhaps at least part of learning to compensate for the problem of age-induced wavering could be greater emphasis on trigger control? If your trigger control is already top notch and my comment is out of place, I hope you will forgive me. But for myself, I continue to think of Ayoob's advice as encouragement that I can improve as I practice (and waver) at the range. My groups may not be world class, but at least I can still connect with iron cowboys.
Here's to being over 50, and continuing to spit those 5 beans back out of the wheel near to the place you meant them to be spat at...