Just watched that vid, & I'm suspicious on Google...new phone imminent, & their previous model starts to show signs of slow downs in the months prior??
They're...not copying Apple again are they?
As an owner of the Pixel 2, the software was never perfect to begin with. I believe a lot of this idea that stock Android and iOS are perfectly stable and perfectly smooth was bolstered by people's general criticism and hate toward Samsung's software. And a couple of years ago, they'd be right. It's got us either believing or pretending to believe that stock Android and iOS are perfect by comparison.
Every phone has the occasional lag, the occasional stutter or dropped-frame, the occasional misbehaving app, etc. Whether it's Samsung's, Apple's, Google's, or OnePlus', all phones have hiccups to varying degrees. And it's okay. They're all generally still stable and good. Even the iPhone X when I had it had the occasional un-registered tap or slight delay in pulling down for search -- and this certainly still happens on my iPad. In fact, whenever these little things happen on any iOS device I use, it stands out because of the aforementioned beliefs that iOS is perfect.
Chrome on my Pixel 2 this morning froze. I had to app switcher it and close it out then reopen to get it working again. That was just this morning, and not the first time.