It’s an easy rule to comply with and nothing stops you from complying with it everywhere.

We will see a patchwork regime, where companies make it easy to cancel if you’re in NYC or another jurisdiction with similar rules, but difficult otherwise. When you see this, you must remember that the easiest thing would have been to make it easy for everyone to cancel regardless of location. That would be perfectly legal and it would be the cheapest option to build. If a company didn’t do that it’s because they made a deliberate choice to spend more money just so they could continue screwing some people over.