tl;dr: Within 24 hours of Epic launching its "vibe-coded" (AI-assisted) new launcher that marketed itself as faster than Steam, Valve pushed an update dropping Steam's cold boot to ~5.23 seconds, beating Epic's ~5.47 seconds. The article also notes that despite the rewrite, Epic's client still lacks a long list of Steam features including forums, reviews, Workshop/mods, Remote Play, Big Picture mode, family sharing, and controller remapping.