Step four, you want to pull the fluid column up to unstick the trash, so go slow ‘down’ and somewhat more forceful on the ‘up’.

I haven’t digested this whole paper, but it seems like it would be faster than fiber all the way. https://people.eecs.berkeley.edu/~sylvia/cs268-2019/papers/starlink.pdf

LEO satellite comms coming online to route some of this traffic should be closer to c since will relay satellite to satellite to the last mile ground station to then reach the destination.