In Wales (UK), they've leant fully into "personalised learning plans". Not to mention they've changed the curriculum completely in the past few years.
This essentially means that every lesson taught has to have a learning objective that meets the needs of each student, so there's a ton of overhead in tweaking, even if it is something that has been taught before.
It's incredible how much depth we (I) discount in other professions on knee-jerk reaction. I can see how there's much more than I was thinking in such personalized systems.