While your memory might be great now, it won't be so forever. Serendipity might not happen as often as you would like, and "important things" may not be all you want to remember.

I'm sure your parents or someone from their generation have actual, physical photo albums from their past - and that the experience of browsing through these photos brings back things that they haven't necessarily _forgotten_ about, but that they wouldn't have brought into active memory unless they were browsing through them.

Over the years I have experienced and built many things that I do not deem "important" to me, yet when I see them mentioned (even in writings by myself), it takes me back to that point in time - all the feelings, learning and discoveries that it brought to life.

An example is scrolling through a list of my repositories on GitHub. Some of the projects on there I have "forgotten" about, but with the mention of it I am instantly brought back and remember a whole lot more details - motivations, feelings, the ecosystem...