What kind of moat did Buffet build? Which prices did he raise? It doesn't seem to remind anything in his career. If anything, "dominating a niche" is Zuckerberg

What kind of moat did Buffet build? Which prices did he raise? It doesn't seem to remind anything in his career. If anything, "dominating a niche" is Zuckerberg's strategy, not Buffet's - the latter's business interests are rather diverse (Wikipedia says his most lucrative investment proved to be Coca-Cola shares).