Warren Buffett shares his biggest leadership lessons after decades at the top

1. Buffett emphasized humility and learning for future leaders of Berkshire Hathaway. 2. He highlighted the significance of carefully choosing and emulating heroes. 3. Buffett advised on CEO succession planning, cautioning against poor leadership motivations. 4. He praised successor Greg Abel's management skills and outlook for the company. 5. Buffett's letter marks a transitional moment as he steps down from CEO.