Based on the text, why was the Nath Bhagavat held in such high esteem by Sai Baba?

The Nath Bhagavat, which contains the dialogue between Krishna and Uddhava, was held in extremely high regard by Sai Baba. Chapter 18 describes it as a 'very divinely inspired book' whose sweetness is compared to the devotion of Tukaram. It is even noted that this dialogue is 'better than that' between Krishna and Arjuna. The text highlights Baba's profound attachment to it through an anecdote where he insisted the narrator return to finish reading a portion of the Bhagavat that had been left incomplete, showing that for Baba, there was 'no satisfaction other than the Bhagavat'. It was considered Nath's platform for attaining the highest spiritual goal.