LRod wrote:
....
Sorry how? "Better-safe-than-sorry" is only reasonable advice when
there is a possibility, even remote possibility of an event occuring.
In the cas of a single home shop dust explosion in a plastic pipe
ducted system there is ZERO chance. ...

Well, the conclusion of the article is to quote..

"...home shop DC explosions are somewhere between extraordinarily rare
and nonexistent."

That is not precisely zero...

While rare, railing at such extremes is just not warranted...