Sayyidi wa sanadi Mufti Mohammed Taqi Usmani (Allah preserve & protect him) explains that the reason for Imam Bukhārī’s (Allah have mercy on him) success is not his profound knowledge alone, rather his piety and abstinence are central to this. He performed at least 14,000 rakʿat Ṣalāh whilst authoring his Ṣāḥīḥ. Acceptance is from Allah Almighty. The congregation is advised to keep this third point in mind when studying the Ṣaḥīḥ.
Source: Seven Days in Bukhara and Samarkand