Also around the time, when it was revealed that some customer teams were offered to keep older specs of the engines, which coincidentally couldn’t always push as hard as the newest ones. Thank god that’s not allowed anymore. Unfortunately were teams just given the same engines, but not allowed to use higher performance modes for long periods – atleast Mercedes engine customers up till last year.
Williams were a consistent podium threat in 2014/2015 and always ended the races with buckets of fuel remaining. One can only imagine what those two cars were actually capable of.