As it has been previously said, if you prefer your racing single player, I would give LFS a miss for now, the AI has never been that great.
Where LFS shines is the multiplayer. I must admit I very rarely play now, tend to stick to iRacing (or hiPricing as I think some of us LFS'ers coin it). You can still find some great racing on public servers. I do like a good cruise server however, despite previously hating it, helps me relax.
What impresses me still about this game is the community, I am amazed at the activity of the forums, compared with the lack of development, and this is definitely a testament to the original product. LFS may not look all that snazzy anymore, but the driving 'feeling' still has many of us coming back for more.