First example: in my experience, there is nothing better than a blackboard for explaining a subject. I have never seen a blackboard that does not work. I also have never had a smooth experience with a smartboard (for starters, it has to boot and the projector has to be on and connected which just takes some minutes), and I have rarely had a good experience with whiteboards (usually the markers just don't work well, and there's no way to see that beforehand, so you end up trying a lot of them).
It also irritates me intensely how often it is assumed that you're always connected to the internet. Games nowadays not only have mandatory updates, but also require you to be connected. I used to play games once a week with a friend, and the experience just sucked. Call of Duty almost always had a multiple gigabyte update waiting for us, so that we had to wait half an hour to play (even though we didn't play online). It has happened multiple times that the internet didn't work, and we just had to find something else to do.
Then, smart TV's have some of the same problems too. I have had some new experiences since my roommate bought a 4k monstrosity with ambilight (which only purpose seems to be that ensure that no-one can concentrate on something else when the TV is on). I have never had to wait multiple minutes to turn the TV on before. I have never had a TV crash on me before. I have never been confused by a remote control before (the remote control has a button with a triangle symbol to go to all apps, and some other buttons with symbols I have never seen before, and there are two different places with apps - some of them are the same while others can only be found in one place). The TV also boots with the sound very loud, and I have to wait until the TV is fully booted until the sound can be adjusted. Which in practice means that I can't watch TV after my roommate goes asleep at 9:30.