If Sai Baba merged into the unmanifest, does that mean he is no longer present for his devotees?

No, quite the opposite. Chapter 43 reassures devotees that although Sai Baba merged into the unmanifest, his presence remains potent and accessible. The text explicitly states that he 'stayed in the hearts of the devotees' and that by simply 'remembering his name, no news of birth or death remains.' It emphasizes that even from this unmanifest state, he continues to guide and 'always keeps the devotees awake.' The book dismisses any doubt about his presence, explaining that in his true form, he 'fills the moving and non-moving world,' and devotees can still have experiences of him based on the sincerity of their own feelings.