Doing some quick calcs based on a couple of educated assumptions
1. For such high data quantities you could get a rate of $1 per Mb currently about $4.
2. Typical data loading of a CVRFDR is about 85 kbps
You get a few interesting results.
Achievable transmission throughput needs to be about 4.5 Gbps to cope with all aircraft, this is a significant increase on the system load, probably meaning that more satellites would be required.
Data charges would be around $3M per hour. Basically a new way of charging for data would need to be negotiated. Or a complete new infrastructure introduced. Either way we are probably talking billions. Money better spent improving primary safety.
Data would have to be stored until it was confirmed that the aircraft had safely arrived at its destination. So a world wide system would need to be defined.
On top of this who owns and manages the data? Airlines? Governments? A global body? A whole new set of regulations would need to be introduced and administered to ensure the integrity and security of the data.