Just a couple concrete examples, if you open an app in a workspace, then switch screens to a different workspace, then click the app in the dock, nothing happens. I would expect to be taken to the screen and have the app made visible, but instead, nothing. I kept thinking that the app must be frozen or something until I switched screens and found it.
Another example, I was carrying my laptop to and from work. I put it in my backpack with padding that protects the laptop. I didn’t jostle it around, I literally just carried it to and from work. I get home and the screen is in some sort of weird flickering bugged out state. I had to forcefully restart it just to get it working again.
With all that said, the trackpads and gestures on Macs are amazing. The displays are also very visually appealing. The performance is good.