Wulfstan was a puntuation nerd. According to Neil Ker’s article ‘The Handwriting of the Archbishop Wulfstan’, in MSS which were not produced under his direction, where Wulfstan’s handwriting is present in the margins, the punctuation has been edited in places to match the dominant scheme of punctuation in Wulfstanian MSS. You can’t tell for sure, but it is to be assumed that Wulfstan did it himself.
Wulfstan was a punctuation nerd. And, on a more practical note, this is a good indication that the punctuation in Wulfstanian MSS is a scheme designed for reading aloud- why else would it be important to synchronise older texts which you were also using with your personal scheme of punctuation?
I am also a punctuation nerd. This makes me feel that I have some kind of affinity with our favourite grouchy Archbishop. I own a teapot mat decorated with ampersands. Sadly, it was not available with Tyronean Notes on it, otherwise I could fondly imagine that that Archbishop Wulfstan would have appreciated it too.