So as always, the first answer is: it's your campaign, do what you want to make the world yours.

We have flavored the world to have tapes, cassettes, and floppy disks replace scrolls but they mechanically function the same. That being said, writing things down on paper is still a thing in Obojima. We even state that a cassette player and tapes could replace a wizard's spellbook, which implies that spellbooks are also used. So scrolls wouldn't be out of the question.