oscrhong’s post makes a blunt founder argument: many "new" startup ideas have already been tried, often by capable teams, so the edge is not originality but learning from what came before. The examples are deliberately concrete—Posterous anticipated Substack’s email-native publishing model, Webvan predated Instacart in grocery delivery, Parse offered developer-friendly backend-as-a-service before Supabase, and Loopt explored location-based social mapping years before Snap Maps launched in 2017. The core claim is that founders should assume predecessors exist and study them closely.

That argument is paired with a product pitch for Startups.RIP, a directory of failed or acquired startups that surfaces retrospectives, rebuild playbooks, and specs. The page shown emphasizes "Startups die. Ideas don’t." and presents old companies as a source of tactical insight rather than cautionary trivia. The post also highlights scale: one version of the pitch says 5,728 YC startups are indexed, while the linked page prominently shows 1,736+ dead or acquired YC startups from 2005 to 2026. In effect, the project is positioned as a research tool for founders who want to revive, reinterpret, or avoid repeating the mistakes of earlier startup attempts.