Add a MQ Server support for Azure Storage Queues
Storage Queues are cheaper and more performant than azure service bus if guaranteed first-in-first-out, etc is not required.
They do offer 'At-Least-Once' guaranteed delivery, where Redis is 'fire and forget'.
Combining this with full featured CosmoDb caching instead of Redis would make a compelling low-cost option.
Darren Sherwood shared this idea
Sam Bosell commented
Would love to see this as well considering storage accounts are more prevalent than having to setup Service Bus or Redis.