1. Tyre change ban in 2005
2. Aggregate qualiyfing Saturday and Sunday in early 2005
3. Direct 6-minute elimination qualifying in early 2016
4. Double-points in Abu Dhabi 2014
Any additions?
Stop it! I have 2 car posters in my garage, the Tyrrell p34 and the Chaparral 2j. I still long to find that alternate universe where the F1 and CanAm series from the 70's had a playoff (raceoff) set of races amongst each of their top ten.
That were more short lived innovations cut short by rule changes, like DAS, DD and F-ducts.