Apple (NASDAQ: AAPL), Coca-Cola (NYSE: KO), and Microsoft (NASDAQ: MSFT) represent three of the most durable compounding businesses in modern market history, and each still looks positioned to reward patient shareholders. Mid-year is a natural moment for long-term investors to step back and assess which businesses have already produced multi-decade compounding and whether the moats driving those returns remain intact. Apple trades around $298 wi…