It seems to me we still do not know the real root cause of these failures.
While there have been several bandaid ideas ..like wrapping the exhaust pipes, using aftermarket bits to cut the power output in half...and the associated heat, etc etc. These all likely help some what....but many of us will still have premature failures that are very expensive.
We need the BMW designers, who truly know the electrical design parameters,of the regulator, stator and armature, the environmental conditions within the engine to step up and diagnose this problem....and share that info with their dealers and customers.
Let the chips fall were they may..but then we will know the best way to a real fix.
This blog, and others are interesting, but after a couple of years now still have not led to proper solution.
Is it time we sent letter to BMW? something else?