Since the realism in the game has increased recently, the developers should focus on making the sound effects more realistic so that it is not necessary to use a separate mode for it.
For example, in the video below, you can get to know the real sound of the Type 10 engine at low speeds
im sure they will get it right eventually. they have done a really good job on the challengers for sound as they do very much sound like a vacuum cleaner possessed by satan, its just missing some depth to the sound. i hope they get around to doing the sounds for every vehicle correct soon