From a historical perspective, how did the Shri Sai Satcharita become a foundational text for the Sai community, according to the preface?

According to the historical context provided in Chapter 0, the Shri Sai Satcharita became a foundational text by filling a specific need for a detailed and comprehensive biography suitable for devotional readings. The text notes that while other poets had written about saints, their works were not detailed enough for a dedicated Parayan of a single saint. The Shri Sai Satcharita, written by Annasaheb Dabholkar, was different. It was published chapter by chapter over six years in the Shri Sai Leela magazine. This detailed work provided the Sai community with a text comparable to the famous 'Guru Charitra,' allowing for widespread study and Parayans, a form of service the Sadguru accepts from devotees.