It surprises me that there are so many on the never list, but then I'm on the multiple list.....
I've honestly gotten out of the habit though - no busts in 4 years now!
For those who think it can't happen, here are a few examples of how easy it is:
Private pilot - pt 141 first stage check (prior to solo) - did not pull out my checklist when demonstrating an emergency landing
Instrument (pt 141 final stage check) - last approach, last landing - I went 10 feet below MDA on an NDB approach.
Commercial Multi - last approach, last landing, single engine - I failed to verbalize that I was feathering the prop.
CFII - last approach, last landing, single engine - went below a step down fix while turning final. Was still rather disoriented from doing the Vmc demo for my MEI during the same ride in full IMC.
Every single one of those were my fault and I certainly take ownership for them, but for those on the never list, it's really easy to join the multiple list! I do plan on extending my bustless streak for a few more years though