The most practical consequence here is assurance. If good works actually save, nobody can ever know they're safe, because there's always more to do and no clear line where enough begins. Faith, by contrast, is something you receive rather than achieve. I'd say Paul's point is that trust in Christ is the hinge; works are the fruit, not the foundation. James doesn't really contradict that, I think. He's saying a faith that produces nothing was never real faith. So good works matter enormously as evidence, but if they're the basis, even the best person is left guessing. That's why I lean faith.