It's all a matter of reading comprehension. People can have a passing knowledge of "something about Delaware" for the next 100 years and never consider that there are 55+ other jurisdictions under the US brand which aim to be competitive too.
All states, the district, the territories, and even reservations have incorporation laws. The reservations are very numerous and many have not even considered the possibility, just show up and ask them to pass your model incorporation law. This is the kind of opportunity that the US still has. (There are many jurisdictions that have passed good laws, but have incompetent and ill equipped executive branches. If nobody has ever shown up to form their super awesome business type, the public servants in the state might not actually know how to do it. Whereas places with validation like Wyoming and Delaware, can have turn around times of 24 hours for things they do often.)
The other way that the US is somewhat unique, in comparison to other countries, is that there is no way to incorporate a business at the national level. Only Congress can create corporations, one at a time, one law at a time, and Congress has never addressed or delegated this to change this reality. The national government derives its power from the states and has never bothered them over this. (They did recently pass some registry of business owners law though, but it's more of a feel good thing for activists than anything practical.)
The beauty of this is that the US has an easier time pointing its bullying efforts outwards, whereas all US jurisdictions escape scrutiny by the US or OECD or other multinational bodies that put "tax havens" on blacklists.
States compete for business, so this makes more and more favorable business incorporation laws pretty easy to get.
The last thing I'll say is that there are other countries similar to the structure of the US, where there are many obscure states you can actually create business entities in. Some countries have incorporation at the national and the state level, just because the separate jurisdictions passed the laws. Some countries you might not even notice are federations of smaller states. So again, its all about reading comprehension. The usefulness of this knowledge is that some countries brands might attract scrutiny now (ie. "Panama corporation"), while the state level version is completely benign to everyone because they just haven't seen the name and aren't allergic to it.