Let me say what I heard you say, differently. BMW redesigned the hub for the S55 and we N54 guys got downstream benefit, that it fits our cars. After all I'm sure you'll agree - BMW's redesigned hub for the S55 (and N54) came out AFTER BMW had well stopped producing these vehicles (2019).Never heard a n54 auto spinning a hub unless second hand parts where reused during a rebuild.
N54's,with stock clutch is also highly unlikely.
Now where I've seen failures are, which includes F series
DCT is quite common in high power applicstions across e and f platforms.
Manuals fitted with single mass flywheels and/or twin plate clutches where dropping the clutch or lightning fast gear changes can put an abnormal stress on the hub due to abrupt rpm changes.
Second, and I'm grasping at this one - the CBC was not included (ala S65) on the S55 solution because BMW had no issues with the bolt backing out on the S55? So they only did the crank hub update?
I get your points on modified cars and BMW's view (and I agree with that). But I'm baffled as to
1) why BMW even came out with the hub update, well after 99% of those cars were out of warranty.
2) why the CBC was not also produced for the S55 update hub, when they took the time to do the hub (and the S65 has it).
My questions make sense?