I think that’s more likely how many of the cars you’ve sollected that are available. That 350 will increase as DLC drops. It’s merely there to show you how many of the game’s cars you’ve collected.
You’re probably all right. Just thought it was an interesting observation - especially as the vanilla FH3 is supposed to have “more than 350 cars” from launch.
Will be interesting to see what the limit ends up being. As you say EpicEvan, hopefully it’s around the 500 mark to future-proof against upcoming DLC and Forzathon prize cars.