Eh.
At this point I'd have to agree, S3 is not really worth the money. S2 was, at the point of the release however, and I don't regret buying either. But sure, LFS feels dated these days. From the standpoint of graphics, Project CARS and Assetto Corsa overshadow it easily.
But at some point over the last decade, I feel like the focus on our dear devs' lives has shifted from being commited to development to other things; it's gotten rather silent around LFS. It's kind of a shame, since I prepaid S3 nearly 10 years ago now, but not much has come out of it so far, but I'm always ready got surprised by exciting news.
So all in all: Worth the price, S3 today? Probably not. S2 back in the day? Definitely.
Just my 2 cents on that matter.