Only allowing a maximum of 50 cars to be picked in custom car restrictions is far too limiting in a video game with a roster of 800+ cars and counting.
Want to make an event with only FF cars? Tough luck, that’s 64 cars.
Want to combine all the supercars and hypercars into one event? That’s 119 cars.
Even seasonal championships such as the Old vs New Classic & Modern Sports cars event from Series 38’s Winter/Dry season is a combined 50 cars total, meaning if any more Classic or Modern Sports cars get added in future updates, then it will be impossible to create a Classic & Modern Sports cars event thanks to the arbitrary 50 car limit.