Ageism is real but i always had other point of view. Whats the root of this misconception? Management. Young programmers work hard, old programmers work smart. Young programmers are cheap, old are expensive. Difference is not only in mental capacity is in expertise how to approach a subject or a task. About learning in after 40: If someone has the need to learn it will happen. But if your mind is not suited for the trip, forget it, find something that gives you satisfaction and happiness..:)