Worked at a major switch vendor as one of the 50 original staff. We put our gear through a ton of test - 4 corners - low power high heat, high power low heat, etc. One of the most interesting was taking the device to a government lab here in NorCal in order to shoot radioactive particle into the board while passing packets. It was pretty cool. The goal was to test TCAM and switch OS RAM to see how it handle bit flips. It passed. The board itself, well we could not have it back for a few weeks to allow it to "cool". The other thing of note was winning a US gov. contact was to enable commands to override any heat related auto shutdown. We were told "look, if the device is in a situation where this is an issue, burn it up but keep it working as long as you can". This was for navy ships.