That after a certain price point, the margin of quality does not increase proportionate with the margin increase in price.
Put differently, a $50 knife is way, way better than a $25 knife; a $100 knife is way better than a $50 knife - but a $200 knife may not be so proportionately better than a $100 knife. The there is more true as the numbers get bigger.
Additionally, there is much more innate joy in using the daylights out of a $100 knife than there is owning but being afraid to use a $500 knife.
I've also learned that those who really use ... I really use at a significant intensity and for a significant amount of time generally seem to have less expensive knives. Those that have unused or very lightly used safe queens and pocket jewelry generally have more expensive knives. Yes, these are exceptions - many on BF, but generally speaking that is what I have found over the years.