I realized that these stories are passed down only by re-telling them. Just think about how much you don't know about your family from 2 generations ago.
For this reason, I created ancestree.marindedic.com
It's a really cool family tree creation app, where each person gets their own book. Inside it, write what they did, what happened to them, what they were like... whatever you want.
Little biographies of your loved ones.
Apart from exporting normal and detailed versions of your family tree, you can even export someone's chapters as one long biography.
Of course, open-sourced, no account, no server. Nothing you draw or write ever leaves your browser.