You have now lived long enough to become more like yourself. So, whatever you want to do, do it!
I always ask my restless clients who are considering divorce in their later years to list the pros and cons, because breaking up a marriage much later in life is likely to be one of the biggest steps they will ever take.
Whether you are the parent or the child, divorce is traumatic at any age. It can be especially difficult, though, when it happens later in life.