That said, outside of admissions, I don't think I got academic value out of them. They were hard for the sake of being hard. I'd rather have taken the SAT or ACT any day.

(also apropos of nothing but I don't think much of the writing section on the SAT either, which was a hot topic 15 or so years ago... a huge amount is dependent on the graders, and it's fundamentally a "blackboard programming" type scenario where the student is separated from basic resources like word processing and graded on the resulting product... that's not how you would actually work in an academic setting.)

I went to a barely-known state university and was very surprised when some of my intro-level gen ed requirement classes mostly covered material I'd already seen in, and with a similar level of rigor to, junior high school. And my junior high and high schools were nothing special at all—at the higher end of performance in the state (so far as those measures are helpful, anyway) but just regular public schools in a state with overall mediocre-bordering-on-poor schools.

If I'd known that the first couple years of college weren't going to be harder than high school, and would have a lower total time commitment, hell, I'd have probably tried to go the drop out -> GED -> start college at 16 or 17 route. I wasn't gonna get into top-tier universities, anyway.

I aced the SAT and ACT but had a decent number of mediocre AP scores because I was seeing the material for the first time when I opened the test. Got to college and after a single 45 minute lecture covering the gap material, I'm pretty sure I could have scored a 5. Ended up making for several easy A's freshman year.

That isn't what they said. They said that access to those tests is not universal. Students from high schools that don't offer AP classes would have a hard time taking AP exams. This would exclude people from rural or impoverished areas.

This is why the SAT and ACT are useful: they are meant to be aptitude tests. They are IQ tests in disguise. If properly designed, they will measure intelligence with minimal influence from education or cultural background. Theoretically something like these tests could be administered to elementary school students and still be useful for predicting success in college a decade later.

Yeah, I wish they'd just flat out told me "we expect AP courses" before I applied for MIT back in the day. Would have saved me a lot of hassle that just resulted in "sorry, we wanted AP credits" in the end.