Speed equals spectacle. That was the simple foundation stone upon which Formula 1's 2017 aerodynamic regulation overhaul was built, encapsulated by the single objective of improving lap times by four to five seconds compared with 2015. This was the panacea that would cure all F1's ills.
It wasn't. Although the changes nailed the target almost perfectly - the average difference between fastest laps on each weekend in 2015 versus '17 almost bang on 4.5s - the rationale was flawed.
Lap time proved to be a false god, one that caused more problems than it solved, and watching last Sunday's IndyCar race at Austin's the Circuit of the Americas was a reminder of that.