Code won’t be of benefit if there is significant push back from the trades. You’d want the buy in from the construction industry; the contractors, and not just the building product manufacturers who have so much to gain from selling legislated products. I can see this being easier to get in some places than others. Building is a traditional practice, so where their is no big economic incentive to update or change practices, tradition will predominate.
The same holds true for any form of gov. oversight, local and otherwise. You want to have positive stakeholder meetings, some education, and hope for the buy-in that’s needed.