I did Montessori from kindergarten until grade 6 (age 12), in Mexico. I really, really like it. I think it reinforces the kids natural curiosity. In middle school, my first year out of Montessori, I was shocked at how little other kids cared about learning. I remember the teacher discussing something about astronomy, and I raised my hand to comment on some fact I had read, and what followed was mockery by my peers an…
Damn, that part about being excited to learn and share knowledge with your peers only to be shouted down dredged up some memories. Most American schools are so regimented that any exploration of knowledge is actually sneered down. How did our communities let it get so bad...
The universal education system we have today was never meant to "inspire learning" or anything similar. It was designed as a vaccine for illiteracy across a handful of subjects. I would argue it continues to deliver on that goal quite well (all things considered).
As someone who never attended, what Montessori offers is more the University-style inspiration and idea of learning for the sake of learning. This sounds amazing for the right people but I find it unlikely it could ever be universal.
Students who go to Montessori will have parent who believe in education in one way or another. The students will learn these values from their parents and so there's an inherent selection bias in the attendees and the positive outcomes.
However, education is not universally valued across our society. Public school exists for everyone to hit that minimum literacy bar.
What would be great is something like Montessori for every student who wants it. A different style of school universally available for the families that value it.