100% of human learning models degrade over time :) And it's not only aging. There's a well known saying: "Science Makes Progress Funeral by Funeral". Humans ha

100% of human learning models degrade over time :) And it's not only aging. There's a well known saying: "Science Makes Progress Funeral by Funeral". Humans have very hard time changing their believes to adapt to new data, not so surprising that ML models experience a similar phenomenon. As the great Max Planck, himself the originator of the quantum theory in physics, has said, science makes progress funeral by funeral: the old are never converted by the new doctrines, they simply are replaced by a new generation.