Yes - I have UOAs where crossover happened. It's not common in diesels now days. When it does happen, it typically is not correlated to any wear issues.
However, as Charlie shows, it can be a big deal. But not because of "normal" operation. Rather, only a mechanical failure indirectly induced the wear escalation.
Charlie - did the BMW start running badly, and you noticed the EGR affected performance? Or, did the engine "throw a code" (MIL)? I doubt the UOA brought it to your attention initially.
Let's not forget that the most common additives used for "bases" (Ca, Mg, et) are also helpful in other manners such as cleaning and lubricating. So there will almost always be a need to have a decent amount of base additives. But the need for super-high TBN (12+) just isn't there today like it was in yesteryear.