I am not sure how this relates to the importance of a 529 plan, whether to save for prep/boarding school, college, or graduate school. The rapidly spiraling costs of education at all levels and how to pay for it unless you’re extremely well-off was and remains my focus. (Even if you are super-rich, why wouldn’t you set up a 529? I don’t think there’s a downside).
And that’s today’s costs. I cannot imagine what it will be like in the future.
Like you, that’s my final comment on this.