Key Topics: Engineering at Twitter in 2010: the Rails monolith, Scala rewrite, and microservices transformation How replacing function calls with network calls changes everything What a service mesh is and why the term had to be invented Control plane vs data plane architecture Why Linkerd rewrote its proxy from Scala/JVM to Rust Latency-aware load balancing, mTLS, and protocol detection Multi-cluster communication and mesh expansion to VMs Common service mesh implementation mistakes Linkerd vs Istio: William's honest take Open source sustainability and enterprise monetization The enterprise sales journey from engineer to CEO Book recommendations: Hyperion, Gideon the Ninth, The Book of the New Sun