I did a goggle and
> found a number of articles and studies on that problem with Tant
> capacitors - so clearly a real potential problem.

I was a technician at Western Electric in Columbus Ohio. One day I was sitting at my bench and a team was working on a central office frame behind me. It had a row of metal can capacitors the size of lunch boxes along the bottom row of equipment. They had the frame powered up and were taking readings all around it, when one of those capacitors went off like a bomb. Heavy cables retained the top plate and the sides of the can peeled down like banana skins. A cloud of silver Mylar slivers floated around for an hour.  I visited the rest room after a while. The delay to be sure my legs would support me.

 

The frame failed test.

 

Lynn E. Hanover