In the 2020 British Grand Prix, Hamilton suffered a tire puncture on the final lap of the race, barely getting his car across the finish line in time to hold off his closest challenger, Max Verstappen. I understand that Mercedes did not want to pit since it was the last lap.
But how about the 2018 Azerbaijan Grand Prix, when Bottas' tire blew up? Why did Mercedes not pit Bottas for a new set of tires, instead of just retiring him? It is just a waste of time to change tires, or it is illegal to change a blown-up tyre?