I think people will lose the ability to read complex ideas that require several pages to communicate if they stop reading.
There are so many short blurbs or summaries or shorthand version written and shared that I"m afraid people's brains lose patience for reading and the ability to follow long form.
And yeah, long form is necessary.
I send and receive many emails per day. It's very common for me to get responses back to emails that address only part of the email. It's as if people stop reading partway through or they're unable to remember the entire email while responding.