> What leads you to believe that he doesn't understand it?
People dont understand the subtle art of language.
I, on the other hand, have always assumed that Buffett made the "I don't understand" remark with typical self-deprecating-but-knowing Buffett charm — as in, "All you people piling into dot-com stocks must be much smarter than I am, because I just don't get it!"
In other words, I believe that, in typical Buffett fashion, Buffett understood everything he needed to understand about technology in the late 1990s, which is that technology investors had gone stark raving mad.
https://www.businessinsider.com/why-buffett-doesnt-invest-in...