The reliance upon tag-like keywords in physical note-taking of this type seems to be a limitation compared to digital systems that allow full text search. That said, the benefits of full text search might be somewhat overblown, as found search terms say nothing of the context and would need either tags or a quick read of the text to provide that context.

This might be said of art, design, or any pursuit. Any design might comprise hundreds of design decisions. The more there are, the more depth to the design, the more facets of the problem space it has examined, the more knowledge it may contain, the more potential to learn.