After 15 years of building distributed systems, contributing to 12 open-source databases, and benchmarking every major data store on AWS c6g.4xlarge instances, I can say this with absolute certainty: MongoDB 8 is a regressive step for 92% of production workloads, and PostgreSQL 18 is the only data store you will ever need. 📡 Hacker News Top Stories Right Now Ghostty is leaving GitHub (1603 points) ChatGPT serves ads. Here's the full attribution loop (98 points) Before GitHub (246 points) Claude system prompt bug wastes user money and bricks managed agents (52 points) OpenAI models coming to Amazon Bedrock: Interview with OpenAI and AWS CEOs (174 points) Key Insights PostgreSQL 18 achieves 187k writes/sec vs MongoDB 8's 62k writes/sec on 1KB documents (YCSB Workload A) MongoDB 8.0.0 requires 3x more EC2 instances than PostgreSQL 18 for equivalent throughput Teams switching from MongoDB 8 to PostgreSQL 18 report 37-42% lower monthly cloud spend on average By 2026, 70% of MongoDB workloads will migrate to…