Is the 'So-ham' attitude mentioned in Chapter 36 the ultimate spiritual goal that Sai Baba advocated for his followers?

No, Chapter 36 presents a nuanced perspective on this. It describes Sai Baba himself as being 'indifferent to the "I am He" (So-ham) attitude.' Instead of dwelling in this non-dualistic state, he 'delights in the service of those liberated in Brahman.' This suggests that while 'So-ham' is a recognized high spiritual state, Baba's own nature and path were characterized by active service and devotion. The chapter highlights his role as a protector who loves his own stories, using them as a pretext to fulfill the desires of his devotees, rather than primarily teaching the 'So-ham' realization as the sole objective.