I agree with the general feeling of the OP that LFS needs some new direction, marketing, etc. as before long, events will probably overtake it and LFS could become an irrelevance. The closest analogy that springs to my mind is the old space warfare game Elite, which was great in its time but nowadays if you wanted to play that kind of game you'd choose Eve Online because it's all that Elite was and much more. I'm sure there are many other analogies too. However at the moment I personally don't see anything in the other sims (that I'm aware of) that blows LFS completely out of the water just yet. As an example, as a European, I find Iracing seems rather US-centric and I begrudge paying subscription money for a simulator where I don't really relate to the cars, tracks and terminology used for example. But if an iracing.eu or iracing.co.uk version came along, with a more European or international flavour, I would be more likely to give it a try.
For me LFS is still the best racing sim but if it is left for too much longer without a fresh lick of paint to generate some new interest, something else will come along which we will all end up playing instead and the collective will to improve LFS will be lost. At the moment LFS still gets occasional mentions in Sim Racing Tonight, but eventually there will be nothing new for them to report on and that will be the last that SRT viewers hear of it.
I suppose the other thing that could happen, which I have seen in other computer games where the original developers have moved on or lost interest, is that they release the code so someone else can pick it up and run with it. I do hope that LFS continues from strength to strength but do worry sometimes that it could just wither on the vine.