There's zero incentive to diverge because if you want to sell into the EU you need to abide by the EU regs anyway. But that only applies to products and servic

There's zero incentive to diverge because if you want to sell into the EU you need to abide by the EU regs anyway. But that only applies to products and services that will actually be sold in other EU member states. Not everything is exported to the EU, and a lot of things are never exported at all, and diverging from the EU rules in those other cases could offer all kinds of advantages depending on the circumstances.