Downsides to incorporating in US?

we are considering incorporating in the states.. So far we have only seen good things about incorporating in the states. It seems fast and easy. And if the words on Reddit can be trusted, it helps in raising funds too. Most importantly we probably need to incorporate in multiple countries as we are b2c and would have users around the globe. But what are the downsides? Not that we are pessimistic but every business decision needs to be taken after considering both pros and cons. How much efforts do accounting, taxes take? Is it better to keep the us branch as subsidiary? For fundraising in the states, is it essential to make the us branch headquarters? How much diligence with corporate laws is needed? Do we need to hire a lawyer time to time to ensure we are not violating any law? There's a lot of class action law suit in the states And if things go downhill, how fast and easy is it to shutdown company in the states from abroad? We are not based in the states.