This has been a golden age for top-line motorsport stars showing versatility. Two of the last four Le Mans 24 Hours have been won by cars featuring full-time Formula 1 racers in their line-up. Two of the current F1 grid have been full-time World Rally Championship drivers. Next weekend, a MotoGP title contender will stand in for an F1 test driver in Audi's DTM line-up. The current F1 world champion is desperate to try a MotoGP bike.
Blinkered one-trick ponies? Not the class of the late '10s.
And yet the absence of Fernando Alonso and McLaren from the starting grid at last weekend's Indianapolis 500 is a warning.