Aspera was/is designed for high latency links. Ie sending multi terabytes from london to new Zealand, or LA

For that use case, Aspera was the best tool for the job. It's designed to be fast over links that single TCP streams couldn't

You could, if you were so bold, stack up multiple TCP links and send data down those. You got the same speed, but possible not the same efficiency. It was a fucktonne cheaper to do though.