Q: I want to buy a Chromebook to run Windows or Linux -- which should I buy?
A: Buying any modern (2017+) Chromebook with the intention of running Windows or Linux is a terrible idea, period. Most can't boot anything other than ChromeOS, and those that can run it poorly. Older models may fair better compatibility wise, but there are still lots of caveats, and it's not recommended to buy a Chromebook as a cheap Linux device. The days where Chromebooks ran Linux well ended with the 2015 models.
Also the "Supported Devices" part of the site suggests going here: https://wiki.galliumos.org/Hardware_Compatibility Which does not show anything working post 2019.
Am I missing something?
He basically seems tired of angry emails from amatuers who brick their machines. Suzy qables aren't even available anymore, so to do what I'm talking about, you need to open the chromebook, disconnect the battery, and rewrite the firmware on the SOIC-8 chip from the command line. If you screw this up, you have a brick and need a CH341A SPI flash programmer to restore the firmware backup. You have one of those handy in a drawer somewhere? Then you might be the target audience. Otherwise, maybe you should reconsider doing this.
2) Don't buy a chromeos device with an arm processor
3) Don't buy a chromeos device with an atom processor
4) Maybe don't buy one with an AMD processor, but I'm not sure?
You're unlikely to brick the laptop anyway, but if you rely on the Google firmware to boot other operating systems, it's easy to accidentally push the wrong button and wipe the drive during boot, and I recall reading about some models that did bad things if the battery fully ran down and they lost firmware battery ram storage.