We're running a Magento 2 store with the B2B module installed. When attempting to start the message consumers, including those that are specified in the B2B module setup, we get the error: "Unknown connection name ampq". I'm told this is because we do not have RabbitMQ set up.
We haven't run into any other problems around this issue, aside from an annoying message in system.log: report.INFO: Consumer "async.operations.all" skipped as required connection "amqp" is not configured. Unknown connection name amqp   in system.log
Our host would charge us $20 for the RabbitMQ service - is there any functionality or long-term detriment to not having this set up?