"Always On" required on Dedicated Plan?

[Bouke]

I have an orchestration function that performs a fan-out to ~100 activity functions. There are 10 instances in the App Service Plan. Only 1 or 2 instances appear to be picking up work, the other instances are idling. After enabling "Always On", more workers seem to be picking up work from the queue.

Is "Always On" required for Durable Functions to perform correctly on the Dedicated Plan?

For my use-case I'm sharing the App Service Plan with an App/WebJob. The Function App will be invoked about once a day and I'd rather not have it consume memory when not in use. So I'd rather keep "Always On" off for this Function App.