In a CS 153 guest lecture, Professor Mike Abbott shifts from technical topics to product, tracing how software moved from PRD-driven project management to founder-led consumer product building, and arguing AI is blurring the boundaries between design, engineering, and product. Nikhyl Singhal shares his background founding companies and leading product at Google, Meta, and Credit Karma, then explains four company phases—finding product-market fit, post-fit process and coordination, hypergrowth scale-and-expand, and late-stage reinvention—each requiring different product skills. He reflects on Google Hangouts as a lesson in solving real customer problems and iterating quickly. Singhal describes The Skip, a curated community and coaching effort focused on careers, and discusses AI’s impact: less value in information-moving PM work, more demand and pay for hands-on product builders with judgment, flatter orgs, anxiety from layoffs, and heightened risk for non-technical middle managers.