Princeton Eliminates Tuition for Families Making $250k a Year

Princeton $250k(tuition) $150k (tuition and expenses), joining:

Harvard $200k(tuition) $100k (tuition and expenses) (82 points, 5 months ago, 106 comments) https://news.ycombinator.com/item?id=43393478

MIT $200k(tuition) $100k (tuition and expenses) (737 points, 9 months ago, 459 comments) https://news.ycombinator.com/item?id=42195895

Albert Einstein College of Medicine free tuition (491 points, 1 year ago, 411 comments) https://news.ycombinator.com/item?id=39516927

Incorrect headline as far as I can tell: I don't see the actual rules stated anywhere, but it's consistently hedged with "most", and their calculator makes it clear that there's an asset test, so if you're anywhere near $250k, planning is likely still necessary.

Are these tuition caps better trackers for what wealthy means these days than say conventional rule-of-thumbs (like making six figures used to mean you were wealthy)?