The idea might work as a computer model, but in reality to board say 35A&F, 33A&F, etc up to 1A&F, then go back to 34A&F through to 2A&F (bearing in mind you’d have to give 1A&F time to settle so that 34 could get past), then start the whole process again for the B&E seats, then again for the C&D seats couldn’t possibly be quicker.

The suggested method also assumes that passengers are all travelling alone, you can’t expect families with young children to board individually.

EDIT: Just noticed on another forum that some US carriers board those without handluggage first. I can see that working as it incentivises people not to carry handluggage (usually the cause of boarding delays) and means that those in the aisles putting bags away aren’t holding up those without bags who are just trying to get past.