I'm quite taken by
https://serverfault.com/questions/655027/proper-ntp-configuration-for-a-few-servers
, though I must admit to a (small) hand in the refinement process.  The OP
has put together an answer that reads well and synthesises a lot of
best-practice guidance.  So my question is twofold:

1. Is *at what point should I stop NTP sync'ing all my servers to community
time sources, establish an internal timeserver pool, and sync the rest of
my servers to those* a suitable question for canonisation?  And if so

2. Does this particular example of that question contain enough goodness to
make the question a candidate for canonisation?