This is BIFL culture math that doesn’t make sense IRL. Plenty of people use the same JanSport $50 backpack for a decade just fine for school.
But that is not the angle I'm thinking from.
I did not see Jansports lasting people ten years when I was in school.
If anything... there's probably some generation gap stuff going on here. $50 Jansports did not typically last people that long when I went to school. But they also made us carry way more heavy-ass books than today I think.
Or have they finally quashed the used book market entirely? Most fellow college/uni students valued getting a few bucks back for their books at the end of a semester.
Also this obviously can't work for primary school students who can't destroy their books at will.
But, good solution