Get closer to the endgame. With fewer pieces left in the position, the dominance of the two bishops can really be felt, as they can control both sides of the board at once. If the enemy knight doesn't have a secure outpost to use, it can find itself passive and restricted in its own territory.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Unknown"] [Black "Unknown96"] [Result "0-1"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "8/5pk1/pp6/2p3K1/2Pp1PP1/3P4/P7/8 b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... b5 2. Kf5 ( { White can try: } 2. cxb5 axb5 3. Kf5 c4 4. Ke4 c3 5. Kxd4 c2 6. Kc5 c1=Q+ 7. Kxb5 { Black wins with a large material advantage. } ) 2... bxc4 3. dxc4 d3 4. Ke4 d2 5. Ke3 d1=Q { Black wins with a large material advantage. } 0-1