My mother tossed out the aluminum cookware about 1948 or 49 and replaced it with S/S after she read about it in Rodale's Prevention Magazine. We use S/S with a copper biscuit sandwiched in the bottom. Cast iron is too heavy for my wife.
I would worry more about exotic birds in the kitchen...
Tell your wife she should be doing weight-bearing exercises to help prevent osteoporosis!!! Lifting those iron skillets is GOOD for her!!! ;-)