According to Is this generic cadence chart from Kostka/Payne generally accepted?,

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However, the authentic cadence in natural minor, which is v-i, does not meet the definition by Kostka/Payne here. The first chord, v, doesn't really contain the leading tone (as the subtonic and the leading tone are two completely different concepts), while the second chord, i, is the tonic. In this view, it seems to be more plagal, but it isn't.

So, why is v-i in natural minor viewed as an authentic cadence while it doesn't fit the definition by Kostka/Payne?

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    Please note that the answer to "is this chart generally accepted" is "not really". – Your Uncle Bob Jul 14 '19 at 3:57
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    Who says v–i is viewed as an authentic cadence? – Richard Jul 14 '19 at 4:08
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    @MaikaSakuranomiya -- I've never heard that before. I have seen several people here at MusicSE suggest to you that Vm-Im is a perfectly workable minor key progression, but I haven't noticed anyone here claiming that it is an authentic cadence. – ex nihilo Jul 14 '19 at 4:19
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    I've always considered that in a minor key, the perfect cadence would be V-i, not v-i. So having that leading note is crucial. (In my world!) – Tim Jul 14 '19 at 5:28
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    Dupe of - 'Can we have a perfect cadence in a minor key?' ? – Tim Jul 14 '19 at 6:37