If you manage to master all of the 2017 season tracks, you can contribute to the infinite number of additional tracks created from the ground up by players from around the world. (cogconnected.com)
All in all there are over 150 vehicles from over eight expansions available here, not just cars, but bikes too as well as additional tracks. (dailyjoystickpodcast.com)
So yeah, the track listing is half decent and you can purchase additional tracks online. (impulsegamer.com)