Your comment shows a fairly decent amount of ignorance. First off, one engine failing does not prove its multi-engine-out capability, it proves its single-engine-out capabilities. The Falcon 9 has not had any losses because there have only been 6 launches, the Shuttle went 24 flights without incident before Challenger. Also, everyone is treating the Falcon Heavy like its the F9, which it isn't. I will admit they are very similar, however they are not the same, and until the Falcon Heavy has been proven, it is not to be treated as a proven launch platform. Hell, the FH was an idea created before they likely even finished design of the F9 seeing as they are still testing new engines to see if they will work better. As much as I love and even borderline worship SpaceX, but there is no such thing as a perfect rocket and until a concept is tested itself, it isn't proven