The Messenger transports get more and more options related to them. Take the AMQP as an example, there are requests to add all kinds of special options in the DSN to support all exchange config available.

I think the transports are too complex and there are too many bugs related to this complexity. I suggest to remove the auto-setup config for all transports. As a replacement, we should add one CLI command to "Set up the transports if needed". That command can have the complex logic. The result would be that everything related to creating the queue/database table will be kept in a single class.