This. You incorporate in Delaware not because it's a tax haven, but because they have the most developed corporate law of any state, and the chancellor/vice chancellors on the Delaware Court of Chancery are without a doubt among the best judges on corporate issues that you will find anywhere in the world.

> most developed corporate law of any state

Honestly this just sounds like the old Swiss tax rules of 'we never disclose your details, even to the feds'.

No, it's nothing like that. Businesses like Delaware because they can easily hire lawyers that know Delaware law, and those lawyers can say with a good degree of certainty that the law means X or Y, because many businesses before them have already settled the case law there.

This is not the case for every state. In some states, your specific business legal concern might be something that is not clearly outlined under the text of the law, and there may be a complete lack of case law to guide your lawyer.

TL;DR: lawyers in Delaware are more likely to answer "yes" or "no" rather than "maybe" to your business law question.