That pixel’s example is so funny cause its suprisingly the most open boooader out there, so almost no devices but the pixel are used for full custom OS’ like grapheneOS.
But to answer your question, a lot of the beauty of Linux is it runs on anything, so if you already had one lying around, you could just slab Debian or something on it and it’ll be snappier than ever.
I also personally like the form factor of the device and the removable keyboard