

Nvidia Shield - The Android update (from 9 to 10, iirc) turned mine into a sluggish, unresponsive piece of crap. I ended up downgrading back to Android 9 and blocked the update servers in my router.
Switch Joycons - This might be a placebo, but I swear that every second Joycon update completely messes with their ability to connect to the tablet via the rails. They still disconnect every once in a while, but I’m certain that some versions of the Joycon firmware made my Switch completely unusable in portable mode.
For those who haven’t studied relativity, this thought experiment is great at showing the “Relativity of Simultaneity”.
The only way the doors can shut from the pole vaulter’s reference frame is if they close at different times. The exit door opens and shuts first, before the tip of the pole has gone beyond it (otherwise it would hit the door, obviously), and then later, only once the back end of the pole has cleared the entrance door, does it close.