Too much information at once becomes useless. I ran into that problem repeatedly today while searching notes and e-mails, and (the one that's been frustrating me all day) getting in trouble on Facebook because I posted "here's my book" things repeatedly and didn't pay attention to the "hey you broke some posting rule" replies in the flood of messages. "Al commented on Bob's post! Bob liked Cindy's comment! Alien ferrets have invaded! Dan posted a photo of her new tail!"
There's a market for an AI just good enough to sift through your notes and communication with language parsing to determine which parts you care about.
From writing and read