Third-quarter earnings reminded Wall Street there is so much more to Alphabet than its Google brand.Google's years-long run as the world's dominant internet search engine has turned Alphabet (GOOG -1.14%) (GOOGL -1.20%) into a technology juggernaut worth over $2 trillion today. The stock has returned over 6,700% since its initial public offering (IPO) about 20 years ago, easily outpacing the S&P 500's 680%.Companies grow up, mature, and then slow down. Sometimes, they even die off. In that light, it's fair ...