Murphy´s law never fail so let´s go to REDUNDANCY
MurphyWasRight
Considering this fact and LOW COST CHIPS i "propose":
1) Multi CVR/FDR (combi) at wing tips, VS, before and after "aft pressure bulkhead" and in other strategic locations (perhaps, at LDG´s)
2) Use batteries to avoid becoming useless after a complete electrical failure in the aircraft.
3) Improve their capability to be located (pingers, special ELT, ressonant transducer, etc.)
Real time data streaming (telemetry) IMO does not seem practical for many reasons.
PS
Instead of just one ribbon, better to use many shorter ones. The long one can be entangled and later buried underneath a big part rendering a pinger or special ELT, "mute".