Yup. Care to share any stories from building prototypes, Gary?
Seriously, I suspect for any of us who've been doing this even semi-professionally for a long time, the total is a lot higher (in today's dollars) than we'd really like to think. And I include things not entirely my fault, such as the stage grunt who, upon seeing a spark from the light control board on the table next to my mixer (not uncommon for those old rheostat-based light boards), immediately cried "fire" and proceeded to spray everything with a coating of dry powder fire extinguisher. Scrapped all the silky-smooth 600-ohm attenuators in a $30k sound board, 24 of them at $600 each (back in the late 70's) plus various other mayhem. The grit just destroyed the sliders. The light guy shook it out, blew it out, vacuumed it up, and went on about his business... As for me, well, as a friend told me in a different setting but applies here: "not your fault but is your a$$".
Lost count of how many EMIT drivers I replaced in my old IRS-2's when my Phase Linear 700 would decide to self-destruct.
What about the antenna tower I was helping to replace that buckled when we cut a guy wire to bring down a section, causing the whole 70' tower to buckle in two and crash to the ground? Some damage to the house, missed the car and our service truck in the drive (thankfully), one tree sacrificed itself to soften the landing, and I nearly had a heart attack since I was on top of the tower at the time and so had an interesting ride down. I've had a mortal fear of heights ever since.
My early attempts at a servo-controlled DC-coupled tube amplifier were sometimes suboptimal, and I found that few speakers appreciated several hundred volts applied across the terminals, even briefly.
TV CRT's retain their charge much longer than you might think. Even more annoying is that new tubes out of the box are often still charged from final test. The results when pulling a brand new CRT out of the box can be shocking, leading to shop cleanup of the remains lying on the floor after being dropped. And a PO'd boss, and customer, and anybody within hearing range of the implosion...
And so on...