And it goes without saying, on this topic, one must watch the short talk on state and country flags: https://www.youtube.com/watch?v=pnv5iKB2hl4
Tennessee and Texas are good examples of State Flags. When you drive through TN, the iconic three-star pattern is found on a lot of bridges and signs now (similar to the Chicago flag being seen everywhere around the city).
Washington, by contrast, is a terrible terrible flag (flags shouldn't have words or state seals on them; you need to be able to identify them from a distance).
This is an okay start, but it should have included a flag redesign with it that matches the new state branding.
That being said, NZ has a recognizable flag (although it's too close to Australia's for sure) and it's not a bad one. By contrast Oklahoma's is really bad and I doubt there are many would would feel compelled to hang onto it if a new one was on the ballot in their next election.
For example, Chicago uses their flag as their branding so they don't need a separate logo. https://en.wikipedia.org/wiki/Flag_of_Chicago
https://www.gannett-cdn.com/presto/2019/03/19/PARN/1a0bebe2-...