Karpathy's Wiki vs. Open Brain. One Fails When You Need It Most.

YouTube/Podcast · ~41 min · Podcast · YouTube

• Contrasts two memory architecture philosophies: write-time compilation (pre-process knowledge into structured formats at ingestion) vs. query-time synthesis (derive answers dynamically at retrieval).
• Write-time compilation delivers precision and token efficiency but is brittle when query intent deviates from pre-compiled assumptions; query-time synthesis is flexible but expensive and inconsistent.
• Argues the choice is not aesthetic — it determines system behaviour under pressure, specifically when users need the system most (novel queries, edge cases).
• Practical takeaway: pick the architecture that matches your failure tolerance, not your optimistic use-case; most enterprise systems are implicitly query-time and don’t know it.