THE ULTIMATE GOAL
Based on all remarks above I see (in general) the following goals in the wiki community
1. Play the game - have fun
2. Reach a specific skill goal (WTTT; driving skill without supports, this Wiki leader boards...)
3. Get a specific car; set of cars
4. Get a specific number of cars - not all
5. Reach a specific % of completion of the game - not 100%
6. Get a full garage - all cars
7. Get 100% completion of the game
8. Get a fully upgraded garage (including 100% completion of the game)
The group of people reaching goal 6 is significant. The group of people reaching goal 7 is a handfull. Goal eight has been reached by ??? and is to my understanding extremely difficult for non-first-hour players.
But the question remains : what is beyond goal 8?