Not to diminish any of his accomplishments, but read his quotes and story as being a product of his time. He famously missed out on a lot of solid tech investments because of his background as a value investor. Value investing doesn't exist the same way it did when Berkshire started making a name for itself. Tech investing also isn't them same as 1997, 2004, or 2010.
You are, and you're doing so naively, because one of the reasons Buffett has been successful is that he stuck to things that were in his circle of competence.
This is extremely superficial.
It's not that he missed out on it, both Buffett and munger said that they didn't really understand technology so they didn't feel a reason to go there. They felt they better understood insurance and railroads and candies and whatnot and they made Bank doing it.
Berkshire has outperformed Nasdaq and SP500 from the IPO (May 9, 1996), 10y, 5y, 1y time periods and he has now $340B in cash.
All this with low risk holding lots of cash. He has not missed anything.