It's said that Sai Baba left his body. Does this imply he is no longer present or accessible to his devotees?

This is a common doubt, but the scriptures clarify that Sai Baba is eternally present. Chapter 43 explains that the idea of him 'leaving the body' is a limited human perception. For a great Yogi like Sai Samarth, this was a voluntary act of merging his form into the unmanifest, and he continues to reside in the hearts of all his devotees. He is described as the complete Supreme Brahman, for whom birth and death are illusions. His physical body was merely an adjunct or a temporary vessel. In his true form, he fills the entire moving and non-moving world. Therefore, he has not gone anywhere; rather, he has become one with Brahman and remains powerfully accessible to all who remember him.