The supplication of Istikhara survives because the Prophet's companion Jabir ibn Abdullah reported that the Prophet used to teach it to the community for all their affairs just as he taught them a chapter of the Quran, a comparison hadith scholars have long taken as a sign of how central the practice was meant to be. It sits within a wider Islamic vocabulary of seeking guidance, and it is often discussed alongside, but is distinct from, other forms of decision making such as consulting a knowledgeable person or drawing on personal experience; classical scholars generally treat Istikhara as a complement to reasoned deliberation rather than a substitute for it.
Because it is a Sunnah practice recorded in hadith rather than a verse of scripture, the details of exactly when and how often to perform it have been discussed across the schools of Islamic law, though the core supplication from Sahih al-Bukhari is used across Sunni practice essentially unchanged. The prayer remains part of ordinary devotional life today, taught in introductory religious education and performed privately rather than in congregation, and it is commonly recommended before entering a marriage, signing a contract, or undertaking travel.