I don't want to rain on your parade. Perhaps you'll find them useful. My mother, and my mother in law, are both in that age range and short-ish. But the running boards are just dangerous. It's so much easier to fall from them than when climbing in the car from the ground. They are simply too narrow to offer a safe footing surface, while at the same time wide enough to dirty your pants when entering/exiting.
If you have air suspensions, entry/exist settings that lower the car are more useful.
Your experience might differ - and I hope it does. But try them before you buy them, if you are in still in time to decide.