The revelation that Charles Leclerc's visor would have been hit by Fernando Alonso's front-wing endplate in their Belgian Grand Prix crash without the halo's intervention has provided proof of exactly why the FIA was right to push against critics and implement the cockpit protection system.
Although the results of the investigation into the Spa crash cannot rule definitively on what injuries Leclerc may have suffered from such a visor strike, the fact we are left speculating over how bad it could have been speaks volumes about the current safety climate.
The Leclerc crash lessons have put the halo in the same bracket as other safety advances that are now taken for granted: such as seatbelts and the HANS device - other ideas that met huge resistance at the time of their introduction from drivers but are now second-nature.
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