Canon are onto it, every thing we thought was needed and more, has been implemented on the Canon 1Dx mark 2 the latest pro level DSRL from CanonThe 1DX is exclusively a pro camera. It is interesting that Canon see the importance of this
"I'm sure almost everyone except the most thick-headed would agree that a well designed lens mount system would prevent accidental release of the lens in all but the most violent and freakish circumstances."