The correspondence principle states that any more complex and more general theory that gives a deeper description of processes and has a wider field of application than the old one should include the latter as a limiting case. For example, Galileo’s principle is the limiting case of special relativity at speeds much less than the speed of light.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.