For one, motorsport have actual spec series with nearly identical cars that highlight driver skill. They're used as feeder series to test and promote talented d

For one, motorsport have actual spec series with nearly identical cars that highlight driver skill. They're used as feeder series to test and promote talented drivers. More to the point of Fomula E, the degree of standardization is changing as the series progresses, with increasingly more aspects of the chassis and powertrain open to development. Having a standard platform at the start made sense to minimize cost and bring in new competitors who don't want to spend the $200+ million a year like Formula 1 or WEC, where only 2 or 3 factory teams dominate and make for boring racing. Even a big company with a racing pedigree like Honda hasn't been able to field a competitive engine in F1. As the formula matures they can start focusing on more areas of technical innovation.