-={ 2021-04-11 19:31:13.137413143+00:00 }=-

Hey August!

 AA> Then the synchronet version adds some added uniqueness.

I disagree.  The address itself is unique without adding any extra proprietary bytes that are totally meaningless to the network at large.  Any alterations ought to be to the serial number portion.

Your suggestion is perfectly valid but to be honest I still believe that a 32-bit hex value for the unixtime or rfc-868 (seconds since 1900) is the best choice for uniqueness over the longest span which is much greater than the 3 year period required by the current standard.  Also it adds meaning to it beyond what is capable for a randomly generated serial number.  Unfortunetly it has a shelf life that is quickly running out whereas the random one doesn't.

Life is good,
Maurice

... Wa biš šam še sceal of langoše leofes abidan.
    Woe it is for the one who must wait in longing for the beloved.
--- GNU bash, version 5.1.4(1)-release (x86_64-motorshed-linux-gnu)