Rather than look at it as a question of
age, look at it as a question of flexibility, health and whether or not you are carrying any injuries.
This can make it a 'yes' one day and a 'no' another
I don't do breakfalls anymore following a car accident which damaged my lower back. And I'm in my late 30s. Koshinage is also out of the question as I cannot load up the damaged part.
All I would say regarding age is that the most important thing to preserve is your flexibility, as that will enable you to carry out your daily life much more easily than if you allow yourself to become stiff and immobile.
Ruth