There is no such thing as too much knowledge or experience
Amazingly people over 50 take fewer sick days than other age groups. Highly experienced people do not get bored because they find new ways of doing things, train the existing stuff, advise hiring managers, and solve problems nobody even knew existed. Experienced people do not cost that much more – but they more than make up for the higher pay by higher productivity, not only their own, but of the entire team.
Source: www.linkedin.com