The problem with scanning is that many of us have a lot of paper most of which we will never look at again. It's probably different today when a lot of things are "born" digital. But for me to scan all the paper I have that I might want to glance at someday would be an enormous undertaking--yes, including school notebooks. In practice, you have to be very selective about what you scan.

On the plus side every A4 page is 2.5g you don't have to move/store. Does help if you have a double sided sheet feeding scanner

If the paper is all individual uniform sheets in good shape and you have access to a commercial feeding scanner, it's a lot easier. In my experience though, scanning old piles of paper is rarely like that.

I did. I never open the files again.

But at least you can throw the paper in the recycling now, instead of never looking at the paper again.

Then OCR it all and it'll appear in your local search results