Agreed, there is absolutely no point going further after reaching a certain reliability level. However, one thing is eliminating risks, the other is limiting th

Agreed, there is absolutely no point going further after reaching a certain reliability level. However, one thing is eliminating risks, the other is limiting the consequences of said risks. I strongly prefer 99.9% reliability where that 0.1% means some insignificant problem over 99.99% reliability where the remaining 0.01% means total disaster. My point is that doing "too much" automation gives diminishing returns (which is not bad in itself), but might also disproportionately increase the consequences of that 0.xxxx1%