Last year I tried it, but I could only get it to work playably on S1 0.3H7, so I'm going to test it with the most up-to-date RTX Remix to see if it works on current versions of LFS.
Yes, it was exactly this video that made me think about LFS, but as far as I understand LFS uses shaders (shader-based APIs for rendering?) and not fixed-function pipeline and thats one of the biggest issues with RTX Remix.
I got RTX remix "going", but the rendering pipeline in-game is odd. Most lighting is static so went unchanged. tach/speedo went blank since it couldn't render to the texture. The only change i saw was smoother shadowing on wheels/tires. At the expense of dropping performance to 20-30fps on a 4080.