Love your post!
My paternal grandmother was the family genealogist. She had photos and meticulously written notes about our ancestors going back to Scotland. Alas, she developed Alheimer’s and, in a fit of depression, destroyed most of it.
My best advice is to share everything, and now. Having family members hold copies of historical family documents, even if they don’t share your passion, ensures that those who do can know their heritage.
We had the same thing happen re our Irish line. Tragic. She had done so much work, and then threw it all away.