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Hi bmnut, I'd challenge the assumption that we are getting the outcomes of BMW's research straight up. In fact, what we likely get is reviewed by marketing and communications. As evidence just consider why different localities get different service schedules.
BMW consider a 10/15 yr service life for its product and the suggested maintenance is based on this life span. Prime example of this would be the "sealed for life" auto transmissions; no servicing stipulated by BMW.
At the end of the day, any additional oil changes above the essential schedule will not do the car any harm. Conversely, not doing them may (or not) do harm.
Ultimately if an owner is minded to keep the car long-term, ie over say 8 years, it makes some sense to do additional maintenance over the minimum in mitigating long-term wear and tear on the car. I totally agree that, for most first buyers, who will keep the car 3 or 4 years max, there would be no point in doing any additional maintenance.
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