In financial systems with a basis in law, no transaction is ever final. It doesn't matter what the protocol says or what the technology is capable of, if the judge says that the transaction must be reversed, you get it reversed, even if that means delivering cash in briefcases or something like that.

In systems with a basis in technology, final means final. If the North Koreans take your money, your money is taken.

This piece from Patrick mcKenzie explains this well https://www.complexsystemspodcast.com/episodes/the-900m-wire...