Erlang/OTP continues to power some of the world’s most reliable, scalable real-time systems - from telecom and fintech platforms to Voice AI and IoT. With built-in fault tolerance, hot code upgrades, and seamless distribution, it remains the go-to choice where uptime and resilience are critical. Companies like WhatsApp, Facebook Chat, Zoom, IBM, Goldman Sachs, Nintendo, and more rely on it to handle millions of concurrent users without breaking a sweat.