Formula 1 is in a period of soul-searching over its future - not only ahead of the start of its next rules cycle in 2021, but also as it comes to realise that the wider, faster '17 generation of cars may have been a mistake due to difficulties when it comes to overtaking.

That light bulb moment, which took longer than it should have to arrive, will likely draw a smile from across the Atlantic after comparisons to IndyCar's dramatic U-turn on downforce-laden cars, which ended up creating a long-awaited revival.