tl;dr: Cloudflare launched K2 in public beta, a serverless event streaming service built as a durable log on top of R2 object storage, offering fan-out consumption, long-term retention, and scaling independent of compute. Unlike Kafka, K2 offloads replication/consensus to R2, trading ~1s p99 produce latency for simpler, cheaper operation at edge scale. Pricing is expected at $0.04/GB produced and consumed, with a roadmap including multi-GB/s throughput, key-based ordering, and Kafka client compatibility.