Perhaps this was raised elsewhere in the thread and I missed it, but I think “good enough” has been a moving target, and it will continue to be. Obviously there will always be Ivy+, but many of the colleges that may not have passed the “good enough” test when I was a student are now desirable and competitive schools (I went to BU in the early 90s and it didn’t have the same prestige factor then as it does now). Northeastern is another great example, as are WUSL, USC and any number of others.
This is basically a case for prioritizing fit (assuming the school is within budget) because many of the schools that our kids are attending today are likely to be considered more prestigious when our grandkids are going to college.