probably because in the GHz era none of this has to be fast anyway. financial programs will be spending all their time waiting for disk or network anyway. it's

probably because in the GHz era none of this has to be fast anyway. financial programs will be spending all their time waiting for disk or network anyway. it's pretty hard to imagine a program that needs to care about decimal floating point in finance that would be slow at a human scale as a result of doing this in software