Durable Objects can use up to ten Dynamic Workers concurrently
Durable Objects can have up to ten distinct Dynamic Workers with in-flight requests, increased from four. This limit applies across all concurrent requests to the same Durable Object because they share an input/output (I/O) context. Other Workers can have up to four distinct Dynamic Workers with in-flight requests per request.
Multiple in-flight requests to the same Dynamic Worker count as one toward this limit.
For more information, refer to Dynamic Workers limits.