I have a cheap chromebook with much worse specs than a pixelbook and it has been extremely reliable.

The linux containers are slow to start but that only applies to the first time you run a linux app after restarting the computer or logging out/in. Otherwise they work great.

Android apps are more of a mixed bag.

The bigger problem is that PWAs don't quite seem ready and Chrome apps are deprecated so there's no good way to make apps that specifically target chrome os right now.