DoorDash utterly dominated the US food delivery market, growing from a small share in 2016 to ~70% by 2025, while GrubHub collapsed from ~70% to ~10%. This represents a near-total victory in a major consumer market segment, suggesting superior execution, partnerships, or strategy. The extreme market share capture makes it a dominant force worth watching, though the speakers note its stock has done "absolutely nothing" since IPO, creating a dissonance between business success and shareholder returns. Regulatory scrutiny, changes in restaurant/consumer fees, or a new competitive paradigm could threaten its dominance.