Same here, I first started playing LFS in 2003 and played for a few years until recently, as I have been experimenting with PC2, AC, RaceRoom, rFactor2 and iRacing with a view to reaching a consensus with my friends (ha!). They seem to be put off by the lack of real cars but I think the variety of cars in LFS is pretty much all that one would ever need.
They're also put off by the lack of real tracks, and while there is plenty of variety in the tracks given all the multiple configurations, I would sometimes like to have a go at racing on some of the tracks that I do know from watching F1 and GT racing. Understandably though there are licensing issues around that, so it's not something I would ever expect to be added with the indie nature of the LFS team.
What makes LFS such a standout experience for me still after all these years, is how it feels to drive and the visual and audio cues that give a sense of speed. It may not have those pseudo wheel vibration feedback things like wheel slip, etc.. but I think I prefer that, as there's quite a lot of tuning in other games required to get it at the right level to be useful but not intrusive.
rF2 is the only one that I would say I think I could come to like as much in terms of driving feel, although I haven't spent much time with iRacing yet.
Also LFS has an easily accessible menu interface which you can access whenever you need it.
I was astonished to find how bad this can be in these other games I've been trying. In AC you actually have to leave the track to adjust your controller settings, which is a nightmare if you're trying to get your wheel settings right or even adjust your in game volume settings (there maybe mods that allow it, haven't had time to look, but that's extra effort).