At the very least, if this passes, the resulting court challenge will provide precedent that shuts it down in all 50 states at once.
The downside will be riding out the intervening months before the court decision comes through. Stock up on ISOs and full git clones of your favorite OS sources.
intervening years
You are assuming that courts will shut this down. Guess what? The Supreme Court is responsible for these laws: https://publicinterestprivacy.org/paxton-age-verification/