Change is hard, especially the most irrelevant ones.https://www.tvnz.co.nz/one-news/new-zealand/two-thirds-against-changing-flag-poll-shows-6093543
And 69% of New Zealanders in a recent poll don't want a new flag
In a few years, the next generation of people won't grow up with the original, the back half of 5 years likely won't remember it, and everyone else wouldn't care.