What are the limitations of using WebSockets with Cloudflare Workers?

Key limitations include connection limits (currently around 1000 active connections per Worker), potential timeouts if the connection is idle for too long, and the stateless nature of Workers. You'll need to implement your own state management if you require persistent data across multiple messages. Also, keep in mind that Workers are designed for edge execution, so very high-volume, low-latency WebSocket applications might be better suited for a dedicated server.