Our control system is stuck on NT4 because it cannot tolerate time changes. Our process control folks bought a GPS timesource and tried putting it in service and ran the whole process into the toilet. It will cost them more than half a million to upgrade all their consoles to be able to go to AD and have timesync. As it is, they are finding it increaingly harder to get drivers for NT4 SP3!
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.