As Formula 1's 2021 rules debate finally reaches its - delayed - crunch point, we look back at the missteps that have made its self-improvement efforts so complicated.
The reasons why F1 so often reaches an impasse when trying to achieve positive change or has to water down revolutionary plans have their roots in deals made and directions taken much earlier in the decade.
We unpick the journey to the current problems, and ask how detrimental the situation might be to the efforts to make F1 more open and entertaining in 2021 and what can be made to ease the rule change debate's progress in the small amount of time remaining.