Huh? There were some reports here in 2016 of outright failures in this thread.It appears that drive train failures have quitened down. Haven't seen any reports of 2015,16 here so far
Here are a few others I have saved from 2015 and 2016:
Model S Technical / Mechanical Issues
New P100d model S failed!!!
a list of them at New P100d model S failed!!!