Montessori is more of a brand. People definitely perceive it to be the way you are describing, but really, if there were something old and certain, it would be widely used. On the flip side, there are lots of pedagogical practices that are proven, and this article is trying to show you how they are probably being disrupted by cell phones.

A brand? You have a lot of successful people coming out of those schools.

?? i went to a montessori school and i learned how to read and write poetry, cursive, tie my shoes, use scissors, all 4 mathematical operations, how to read novels, hell, i used to read our encyclopedia for fun, did a project on the bernoulli principal, and more, all before 2nd grade. no one i have ever met had an identical experience

The comment is really weird.

it was more to illustrate the point that montessori isn’t just a brand, it’s a whole different way of teaching and learning

Not your comment is weird. The above comment is weird. I think you're right and they're wrong