I like this. The Thermopen thread inspired some thought.
I'll post there later, but for me and my family, I see things a bit different than the industrial/professional setting.
Keller has a "clerk" following behind him. He knows it, and has become loose in hygiene. That doesn't mean the meal is unsafe. Did he cook thoroughly, and serve timely?
My home environment is certainly different than a Keller establishment. Not the least, he has a mop crew(figuritively and literally). He has a turnover greater than I.
The greater concern that I frontload, the safer and longer "unlived" are my leftovers.