I think some people are underestimating the talent pool and production of New Zealand cricket. Kane is truly special player. I would be surprised if I saw a better player in the black cap.
But the supporting players aren't that level. Boult is a great talent and perhaps a top 10 bowler for us. But we have consistently produced great bowlers. Ferguson's pace will be harder to replace. Hopefully the development work that has supported him will inform future development programmes. Henry is pretty much about average for a New Zealand bowler.
Neesham is a special talent, but power hitting all rounders seems to be our specialty area. (Incidentally, imagine this side with de Grandhomme replaced with a fully fit Corey Anderson).
Taylor is another special talent, and in our ODI side might be harder to replace than Kane. But I'm not convinced that the rest are significantly better than at any other period.
I guess what I'm trying to say is that if the fern was around in 92 we would probably have said the same thing. And in the 80s when we had Hadlee and Crowe together. And around 2003 as Flem, Astle etc retired.
But actually, every generation we've got better. The freak talents (Hadlee, Crowe, Bond, Kane) might keep coming at same rate, but the talent around them will keep rising.
I'm not predicting a Australian or West Indian period of dominance in another couple of decades. But there will be other teams that have as good or better chances to win major titles.