FST in crashes
The fact of the matter is that, normally, in a survivable crash fire scenario a la A340 AF survivable crash in Malton and well over a hundred others, that the fuselage cracks or fractures allowing ingress of toxic gases into the cabin. This has never been tested on 787 despite a series of industry inputs stressing the vital necessity of such testing given the flammability and FST characteristics of epoxy composites.
So now it seems that in-service issues and experiences will either validate or obviate such fire, smoke and toxicity concerns. And only time will tell and I am not optimistic of the outcome.