> The idea is that developers must not hardcode any assumptions. The
> reason they must not is because IANA will later delegate the currently
> unassigned parts of the space to a purpose we don't know, including
> possibly an extension to Global Unicast.
The proposed text reads as if the IANA delegation is the main
point and the implementation note being just a side note.
So if the implementation concern is the main point of the paragraph
why not say this explicitly with something like
Even though currently only 2000::/3 is being delegated by the IANA,
implementations should not make any assumptions about 2000::/3 being
special, since the IANA might later delegate currently unassigned
parts of the IPv6 address space to the purpose of Global Unicast
as well.
Erik
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