On " to allow for implementations to more easily support both versions of the protocol." "more easily than WHAT?"
I think this is referring to the section on timescales which states as of -02:
Ideally it should be similar or identical to the existing epoch and data model that NTPv4 defines to allow for implementations to more easily support both versions of the protocol.
Ulrich writes:
I think this is referring to the section on timescales which states as of -02: