In a world where AI delivers instant answers, why invest in personal knowledge management? While AI promises efficiency, there's something irreplaceable about managing your own knowledge ecosystem. Discover five crucial aspects of PKM that AI cannot replicate: unoptimized search that fosters serendipity, the grounding power of written thought, personalized context that reflects your unique perspective, necessary friction that deepens understanding, and the preservation of human cognitive autonomy in an age of increasing AI dependence.