The issue has been talked about for at least the last 10 years but not so much as a concept has passed me by. So for now we still get the same flammable plastics and foam clamped to our heads with nice chimney-effect air passages around the burnable bits. If anything the risk appears to have been going in the wrong direction with the Mk10 over the Mk4 series.
Of course, the nomex helmet liners (courtesy of Luftwaffe) that some of us wear remain verboten.