In the past, the older generation was a source of knowledge and experience. Nowadays the older generations has little understanding or experience of the modern world. What is the reason behind it?

Every older generation has knowledge & experience that is never dated or obsolete—human knowledge & experience of joy, loss, sorrow, the inevitable passage of time—the understanding that everything modern will become old-fashioned & embarrassing in the blink of an eye, while much that was regarded as old-fashioned will suddenly be timeless—wisdom isn’t guaranteed for everyone who is older, but it’s among the old that you’ll find it. And part of that wisdom is learning that technology is never as vital or important as our human qualities.