Is storage mandatory?

I’m reading about [hangfire at Hanselman’s blog][1] and he’s saying this:

It’s a fantastic framework for background jobs in ASP.NET. It’s even optionally backed by Redis, SQL Server, SQL Azure, MSMQ, or RabbitMQ for reliability.

But in [the documentation][2] I see this:

Storage is the only thing required for basic configuration.

So is Hanselman just wrong and having storage is mandatory to use hangfire?

I think that by “optionally” he means you have the option to select a storage from the list of storage providers, not that you have the option to select or not select a storage. As far as I know, storage is required.