No survivors for sure. But if there are deadly flaws in the millions of lines of FBW code all the new planes are using, it is imperative we find out now, not after the next Boeing product kills everyone on board due to faulty software.
“The blue screen of death” means something different to a totally computerized flight control system.
Why hasn’t a US Navy sub been brought in to listen for the flight data recorder? Certainly, a sub has sonar good enough to pick up the pings from those devices. Locate them, send the lat/longs up to the surface, then mount a recovery operation. After that, the sub can go along its merry way. Sheeesh, how hard can that be?