Not entirely accurate. Public schools might be consistently 20 years behind on things but Private schools certainly are usually pursuing some form of bleeding edge. That is in part why parents send to private schools.
That is by design: Public schools don't get to pick and choose who attends and thus don't get to pick and choose who the parents are and thus, what the environment at home is like.
15 years ago WikiPedia was extremely controversial. They were full of unverified articles, claims and agendas - the 2000's equivalent of "hallucinations".
As WikiPedia has gained inertia, popular articles have gained more eyeballs, more attention where those issues are mostly gone.
In 2026, we haven't yet figured out how to bulid LLMs that will safely tutor students without also telling them how not to make their own drugs or to kill themselves because Dad always screams at them when they get home and they want it to stop.
Even if an LLM had a 1% error rate, in Public schools that have thousands of students per county, someone is going to die from what an LLM said and that one lawsuit is going to bankrupt that school.