What was the long-term effect of the grape miracle on Boss Dharamsee? Did it really change him?

The incident had a profound and immediate transformative effect on Boss Dharamsee. According to Chapter 35, the experience completely stunned his state of mind and made him forget his "clinical scrutiny." The text explicitly states that "All his ego dropped away, and love for the saint was born." This wasn't a fleeting moment of surprise; it resulted in a permanent shift in his perspective. His previous skepticism vanished, and in its place, "love for Sai arose in his heart." This culminated in the "eagerness to come to Shirdi" becoming a "firm determination," indicating his conversion from a curious observer to a committed devotee.