Highly Scalable Fault Tolerant Scalable Systems Considertions:
Dr Tanenbaum on Fault Tolerant Operating Systems.
https://en.wikipedia.org/wiki/Andrew_S._Tanenbaum
Murphys Law:
https://en.wikipedia.org/wiki/Edward_A._Murphy,_Jr.
https://en.wikipedia.org/wiki/Murphy%27s_law
If there’s more than one possible outcome of a job or tasks and one of those outcome will result in disaster or an undesirable consequence ,
then somebody will do it that way.