You can install vanilla Linux, but huge headaches are involved.

I did it, and it worked, but I had to open is and remove a foil (equivalent to a jumper), go to developer mode, then flash a new bootloader by running a script from GitHub.

Think flashing a ROM on a pretty locked down Android device.

The upside is that when the process is done, you have a regular PC and no need to do any cumbersome process again.