I guess if your goal is just to stream aircraft telemetry and black box like recordings then latency may not be high on the agenda.

Black box data doesn't need that crazy throughput either though. Traditional RF is much easier to get right, and works even when the aircraft starts losing track of where it is and stops being able to track the satellite with its laser

I think it's the opposite? For small telemetry you want it now, but for the big data products there's no hope of "now" and so you settle for soon.