> scoped address without sccope (fe80::1) is ambiguous

Sometimes - but sometimes not.

> and useless.

Sometimes - but sometimes not.

> consider the following example: [...]

Yes, in that case it is ambiguous.  That is not to say that scopeless
ntop conversion is useless in all circumstances; ambiguous output can
still be useful.

After all, why does NI_WITHSCOPEID even exist, instead of being
permanently on?

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