We have discussed this to death (sic) before on this forum (threads should be merged to avoid duplication)
The interest is in the timing of anything new.
The NTSB want stuff because it sounds good re: investigative tools
Those on the pointy end don't like the 100% invasion of privacy while only picking their nose (gut feeling that it may show up on U-twoob)
The pro-active safety professionals have their wants as well but this is not on their short list.