Might speculate, remembering BMW want good reviews, that they feel VDC might be needed for reviewers to feel the suspension as sporting. Without it, as I drove it, it felt very good over bumps but more like a limo than an M3. As I kinda liked it I'm trying to figure out whether VDC will help in Normal mode in town to make it even better. So far unless I go racing it may not be worth it for me.
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