Horizontally Scaling Node.js and WebSockets

James Simpson discusses strategies for horizontally scaling Node.js applications with WebSockets, emphasizing the importance of preparing for scalability even when building a minimum viable product (MVP). He highlights the need for automatic failover to prevent system outages and suggests using load balancers and messaging systems like Redis and RabbitMQ for effective application performance. The focus is on creating resilient and scalable infrastructure for web applications.