> Don’t bank transfers take 3-4 days? Uh, what? What does this have to do with interstate commerce? ACH doesn't operate on a state by state basis. ACH can tak

> Don’t bank transfers take 3-4 days? Uh, what? What does this have to do with interstate commerce? ACH doesn't operate on a state by state basis. ACH can take a couple of days to clear (usually 2), but that's not really relevant, because most business isn't done through bank transfers. And for invoices that are due net 30 or 90, having a two day latency for the final transaction doesn't make a difference. Interstate commerce in the US is generally trivial, mostly because the Constitution makes it very clear that states have next to no ability to regulate or prevent it. The only main exceptions are industries that are heavily regulated within a state (ie, if you want to set up a new health insurer in a state, most states require you to get a license from that state - which isn't really regulating interstate commerce, but having state-specific regulations you need to be aware of. This is uncommon). For general businesses like we usually talk about on HN, there are very few barriers to interstate commerce in the US, especially compared to the EU.