I can´t talk for others but I think I´ll always have Part1 in my memory.
After all, I kinda miss a lot of what made me like the Naruto in the first place.
Yeah, it is possible.
He (in the flashback) already lost most of his brothers, and depending on what he felt in the moment of their deaths, he might have already unlocked it.
So, does it bother you, even if just a little, or is it the total opposite? I´m talking about stuff such as:
-Electronic boards (shown in the chunin exams)
-Monitors in Kabuto´s med/meth lab
-Walkie talkies and so on…
I personally like it; it adds a bit of uniqueness to the series, it´s...