The swarms of carmakers flocking to Formula E is a chance for F1 to think about going back to the future with its next engine.
That is the view of Red Bull boss Christian Horner, as the sport looks to move on from the controversial 'power unit' era post 2020.
Talks about the 2021 engine are already taking place, and it appears F1 will simplify the current V6 engines by adding another turbo and reducing the hybrid elements.
"The manufacturers are all going to Formula E, which is their playground for future technologies. Porsche, Mercedes, Renault, Audi, Jaguar -- that's already more than formula one ever had," he said.
"The cost of Formula E is 5 per cent of a F1 budget, so what I can imagine is that the mass scale manufacturers go there and the sports car manufacturers like Ferrari, Aston Martin and Lamborghini are in F1. That's their place.
"So I see formula one at a crossroads," he explained.
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