I've always wished for community cars but more so, TRACKS.
Let's face it, most of the track in LFS are rather plain and boring with no real racing feel. I'm sure there are quite a lot of talented people who could help in this department and make the game even more popular to the rather small sim community.
With physics being as great as they are, it all falls short on the current tracks, IMO.
And with only track mods, there's no fear of a mod exploiting the game, ruining it, etc. Server admins will simply choose what they think is of quality.
Sadly, this topic has been raised ever since I've been a part of LFS and so far, the devs don't seem to give a flying poop about any of it.
Shame.