Comment Re:Recording all data to and from a machine (Score 1) 76
That would require basically infinite storage and run very, very slowly. In effect, the disk (which is the slowest of CPU/memory/network/disk) becomes the bottleneck preventing any of the others from being well utilized.
There are much better ways to track what happens on critical systems, but they introduce costs that most organizations consider excessive or unnecessary, right until after a breech where they realize how the alternative can be orders of magnitude more expensive.