Alpha Beta Omega
Veteran
No, I haven't lost anything. And it forces you to develop good habits.
We shot with a RED camera and one CF card was bad which due to human error they didn't realize during the shoot. When I began edit and didn't find all clips I knew something was wrong!
We had to do a whole new day of shooting but on the up-side we got some unique extra material. So even with something like a RED you f-up.