Executor: A component which is stateful, can only scale vertically & is a single point of failure

[ChayanBansal]

Is there a way we can make executor to scale horizontally while maintaining the concurrency and other limits for the function?

As far as I understand, executor is responsible for creating a new instance for the function based on the configurations and it stores the state of pools in-memory. If we introduce multiple replicas of executor, each replica will have different state leading to unknown/unwanted state of the pools. Please let me know if I am missing something here.