Back in the day of hard drives, the random access I/O would be nasty and you'd have to be careful about creating sparse files, so you'd end up double writing th

Back in the day of hard drives, the random access I/O would be nasty and you'd have to be careful about creating sparse files, so you'd end up double writing the missing packets. you'd also still need congestion control so might as well just use TCP to retransmit.