alt Hacker NewsMarket cap doesn't really feel like a good metric of anything other than what it would take to buy a company out. DuPont has a market cap of 30ish billion and 3M around 80B, and both are both larger and frankly more important than probably even Google.
Yeah, the fact that $2.5 trillion of actual investor money chose Google (Alphabet) means very little: what really matters is the opinions of anonymous commenters on HN (especially opinions that start with "doesn't really feel like")
People are so careful when writing anonymous HN comments and so careless in choosing where to invest their own money and the money of funds of which they are the professional manager