In many ways, it's the same kind of thinking at work now. There's a small handful of technology companies producing -- or at least promising -- incredible growth. Only now, rather than the advent of the internet, it's the advent of artificial intelligence that's driving the bullishness. (In the interest of fairness, unlike far too many dot-com companies then, most of today's AI-related outfits at least have a shot at eventually becoming profitable.)What gives? Why are investors willing to pay premium prices ...