So maybe its the processor,not the OS?
To make a comparison, my 2016 15" Touchbar Macbook Pro is a constantly, spinning beachball machine above all else. It gathers dust in the corner while these machines that are 1/5 and 1/3 the price are an actual joy to use.
I've played with the Linux install on the Pixelbook, but haven't yet taken the time to move over completely from Crouton, which works fine for me.
There's a few funky things. For example, it becomes easiest just to store all your files in the Downloads folder as that's the only folder the chroot can access. But it seems like they're ironing those things out.
I've been a happy Mac user since 2006. I'm suddenly a huge Chromebook advocate. Both of these machines are the best experience I've gotten from a new machine since I got my first Macbook Air.