Depends on the poly count of the meshes. Nanite has overhead. It’ll hit performance a bit. It’s mainly for very high poly count meshes. Say a scene with billions of poly’s. Each mesh having 500,000 or more. More, like million poly meshes is preferred.
If you aren’t going for that level of detail (not good for multiplayer), then going traditional is more than likely the better road.
You have to weigh it yourself. Nanite performance vs traditional.