I think that Romain’s accident shows that with following wind and great deal of good fortune, the work of the FIA safety group has paid fantastic dividends.
Who knew that the halo would make diving through the centre of Armco barriers survivable? Certainly it improved your chances of not being struck by flying debris and wheels, but what an amazing unintended consequence
The structural requirements, the procedures and organisation all played a part.
We also saw men running across the circuit with fire extinguisher, the cause of death back in 70’s!
One thing that will not change is the the energy to dissipate will still be proportional to mass x velocity squared......a sobering thought.