[ccpost]

We write things down, and most things are relevant only in the moment or for a short period of time. As time goes by, the usefulness of our notes usually decays rather quickly.

This is the key bit for me. Once I started prominently dating my notes it became much easier to see at a glance how things naturally become less relevant as time passes. Sorting by recency makes it much easier to find the relevant things than inevitably stale categorizations.