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Warren Buffett, moats, and Coke
Beyond obvious Warren Buffett is on the Mount Rushmore of Investors if not the 1st pick.
One of his famous quotes was about having large moats around his companies that would be virtually impossible to challenge/break down.
His line about Coke was "it would take an investor 20 billion dollars to compete with them and try to start a cola company from scratch"
Today Coke (and another top 10 holding Kraft Heinz), both consumer product plays why still having those moats, essentially don't need them as no one is trying to storm the castle and go after them so to speak.
Things do change. At one time he said he'd never invest in tech, and yet has stake in Apple has become 45% of his portfolio and without it, would have severely lagged the market the last 5 years.