I think that the real problem is not that you cannot see your own tyre tracks (ok, doable by your own system), but that people would then want to see the tyre tracks generated by other SRVs, and that is where the network load would go up a lot. I can recall times when I have been in the same instance as others Players in Super Cruise, and the number of NPCs has gone up rapidly (I seem to recall that there could be up to 15 NPCs per player, but I am not certain of this), and the FPS has gone DOWN at the same rate of knots, to the point where I saw FPS as low as 15 (and on my PC that is one heck of a hit, as it is no slouch).
How much network code do you think it would take to draw 32 lines and save them?
More network code than sending positional updates for several hundred ground and air units as well as their ammo that Falcon 4 was pulling off almost 2 decades ago?