Yes, I do, and I'd say the opposite. I started using incremental reading after using Anki for 11 years, and now, five years later, there is no way I would go back to the Anki style.
You can check my YouTube channel, 'Pleasurable Learning', for a course and many videos on how to get started with incremental reading.
Montessori may be a limbo, but is not the solution. Plus only covers the younger children. The solution is self-directed learning.
>>>One size fits all is efficient, but not everyone is the same size.
Exactly, from you briefness I am not sure I can understand the way you intended. That is the reason only seff-directed learning fits everyone, as everyone is different, having different passions, talents etc.
Age depends on country. There are countries that compulsory schooling is up to 18 or even 19. The point is not bypassing high school into getting to college, but to never attend the school system. Free (as in freedom) learning. Call it unschooling.