armagnac2010
Most commercial aircraft are still flying around with the same model of CVR and FDR they were delivered with decades earlier. It is rare that updated recorders are fitted to existing aircraft, and it's very expensive to do so. To mandate retrofit would require an Airworthiness Directive - and those have to go through a cost/benefit analysis to justify the expense, and it's very difficult to quantify the financial benefit of improved data recorders.
There are still commercial airliners out there flying around with the old foil style recorder - in fact about ten years ago I was investigating crash FDR data from an analog foil recorder (the only engine parameter was EPR - and that of questionable accuracy).