It wouldn't just be about "good versus bad", but about different versions of each track. Just one example: I never ever played rFactor online, because of the huge amount of work involved in finding the right car and track versions to join a server.
Not only does having to install numerous tracks in numerous versions bloat up your install and propably cause combatibility issues, but it also takes away the thing (besides the physics) that make me, a paying customer, play LfS more than any other sim out there: the easy pick up play.