Using your mind to "untangle" is the whole point and pleasure of reading. Using llms to expand your understanding of it makes sense, but "Outsourcing" the reading not so much.
People want to sync their data, work on and see the same thing on their phone, their laptop and their desktop. This certainly did not "just work" when "we used to have offline everything".
> But once AIs become your lifetime companion that know everything there is to know about you and the lock-in is maximized
Why? It's just a bunch of text. They are forced by law to allow you to export your data - so you just take your life's "novel" and copy paste it into their competition's robot.