Warren Buffett's succession plan swings into action, but it won't necessarily be easy for his successor
1. Warren Buffett is stepping down as CEO of Berkshire Hathaway. 2. Greg Abel is appointed as Buffett's successor after years of succession planning. 3. Buffett's legacy includes a 5,500,000% rise in BRK-A since 1965. 4. Investors express mixed feelings about the leadership transition. 5. Berkshire's cash pile approaches $350 billion amid high valuations.