So...
... unlike channel bonding, this will run all available connections flat-out independently from each other, and from their website the data transfer can survive the drop-in/out of one or more of them. I wonder how long it will be before this becomes default? Even if they are pitching it at data centres right now, it's got benefits even down to mobile phones (like in areas covered by wifi and cellular, but with variable or marginal signals), where often the switch between them mid-transfer drops the file and a restart is needed. Good stuff, well done.