The Internet has generated in me an habit of information hoarding. At the beginning I would bookmark useful information and then take notes on paper of the useful things; with the passing of time distraction has started to creep in: more and more useless information, more and more FOMO.
2. Omnipresence of tech and privacy concerns
An increasing number of actions require emails to get done, this rises privacy concerns. When I was 14 enrolling in high-school meant filling a form in pen and paper and bring it to the administrative office. 11 years later, my sister needed an email and personal information on the net. I really don't like it.
3. Affliction due to envy
I haven't used social media since I was 19 but HN and reddit are not really better: there are a lot of thing that I just wish I could forget and fill me with envy that I would have never felt if I had never read about that particular thing. It is obviously irrational being envious of something that you didn't event wanted in the first place, but the irrationality of that feeling do not make it less real and painful. Sometimes I do a 30 day diet and I do not visit HN or reddit, but the feelings never really go away.
4. Ephemerality
I still have some books passed by my great-grandmother belonging to my great-grandfather during the Second Italo-Ethiopian War. I still have all my books from middle- and high-school. These required passive maintenance: just put them on the shelves far from fire and done. On the other hand I've lost entire years of data (photos, books, notes) during a single incident that rendered my physical back-ups useless.