A technical review of SpacetimeDB reveals its open-source implementation relies on a shared global mutex, prompting community debate over its architectural novelty and the risks of executing application code directly within the database. While the article's even-handed approach to database trade-offs was praised, readers noted that running user code inside the server introduces significant challenges regarding language restrictions and preventing infinite loops. Ultimately, the discussion underscores that reliability and provable correctness remain more critical for database adoption than misleading performance benchmarks.