What does boruto mean by “the age of shinobi is over”?

[Sof6p]

Wow, that was a quick ban. God damn.

OT: Either he means that the age of the shinobi is over because tech is taking over or because all shinobis are dead.

I would lean towards the former, the latter implies all ninja have been wiped out Sarada, Mitsuki to name a few. I believe that the words of Kawaki imply that the war against the ninja is beginning and he is the one who will start it as well as end it.