A rift in the NTP world
Why not get rid of NTP altogether?  For servers, they ought to be able to accept a hardware time and frequency inputs.  Typically this would mean a 1 Pulse-Per-Second (PPS) signal and a 10 MHz signal.    You might also want some kind of serial signal that describes the date and time to label the last second pulse.<p>Why don't any professional servers come with this kind of connection built-in?  Why can't I synchronize my Xeon chip's clock to my own reference frequency?