So, where does science stand regarding longevity and fidelity. The situation with longevity seems a bit better. For one thing there's a science of longevity, featuring evolutionary theories affecting senescence - such as the 'disposable soma', 'mutation accumulation' and 'antagonistic pleiotropy' theories of aging - and things like 'the reliability theory of aging' - which is a non-evolutionary theories of aging.
How about fidelity? 'Fidelity' is perhaps not quite the right word. We want a term to cover avoiding mutation during copying and avoiding mutation at other times. There are engineering sciences of error correction and detection that deal with high fidelity copying and transmission. I haven't really heard too much about a science of robustness - or staying the same. However, those who make computer memory chips are sophisticated students of this topic. Perhaps any lack in this area is not too important. Repology and the science of copying seems to be a much more significant missing piece.