We evolved from an oral to written tradition because writing allows for a level of intellectual and emotional complexity that speaking does not.
We shouldn’t act like the death of literacy is no big deal. People will become dumber. They already are.
We’re reverting to an oral culture and nothing is going to stop it as long as phones and social media exist.
But that doesn't mean reading has to end.
Someone who hates reading can scroll twitter hours and hours a day even thoug it's filled with text.
It's because twitter is in the maxims/sayings/proverbs/adages category. This is compressed and accessible.