[dalbasal]

This probably would work as a one off. It would be very hard to do at school with >1000 students.

Also... beware of first principles, back-of-envelope calculations. They can be useful if you are creating something from the ground up, less so for reform.

[rossnordby]

Yup- I'm sensitive to the unforeseen consequences of rug-pulling a massive existing social structure. If I actually had skin in the game and was forced to make policy decisions, I'd probably focus on pushing the start time as late as is practical, and then later smaller scale incremental experimentation.

On the other hand, maybe distance from it has mellowed me too much (even though I still think the current design is responsible for a not-small number of dead kids). 17 year old me was pretty upset about the whole thing.