As with everything, it depends on what you have, and what you want. I have a stone dust “paddock” around my barn. It keeps the horses out of the mud, packs down well enough to be driven on, but can be dragged around to level it, etc… I also have heavy, heavy clay as far down as you can dig. If we didn’t remove some of the topsoil from underneath the sacrifice area, and put down geotextile cloth, it would mud. Any sand or footing added to the area would just be lost in the mud.
If people have well-draining soil, or maybe a sandy loam, perhaps they don’t have to remove the topsoil and just mow/drag it to keep it from growing grass/weeds. I have never had any issues with stone dust on my horse’s feet, and have had virtually no abscesses in the last 10 years, but as with anything, it depends on the weather, the horses, etc. I’d rather risk abscesses to gravel than issues with mud.