Notes become useful only when their relationships are visible.
I write ideas down so I will not lose them, but capture is not the same as retrieval. Once a file grows, the useful thought is still there and still hard to find.
One heading can hold several different lines of thought. Rereading means reconstructing the relationships from scratch, so I usually avoid doing it.
A useful system should make the claims and connections visible while keeping the original words close enough to check.