As RBR loses more points to Ferrari in the battle for P2 in the WCC and VER is cruising to a title win, this seems relevant.
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The winning WDC driver was not in the WCC team in 1958, 1973, 1976, 1981, 1982, 1983, 1986, 1994, 1999, 2008, 2009, and 2021.
Let’s work backwards. In these years, the WDC driver’s team was P2 in the WCC.