Sure it's possible, but then you make a single mistake during booting and your Linux install is wiped out. And the prompt you see during booting is worded to encourage you to disable developer mode and revert to ChromeOS.
Mine was something like 'Your Chromebook is in developer mode, press enter to start ChromeOS' along with some messaging about how dangerous developer mode is. Very easy to accidental press enter -- I know because I did it.
That is a problem that could easily be fixed if there is demand. I don't know what you are defending.
I'm not defending anything -- I'm just not expecting Google to fix that so we can run Linux on old Chromebooks.
I meant there is very less demand of running linux on chromebook, and it is definitely not the reason schools are not buying chromebooks.
I was responding to my parent, which was about running Linux on Chromebooks, presumably to extend their life beyond the relatively short time that Google will provide updates. And that's not because schools want to, but because supply is tight right now. It sounds good in theory, but Google and/or the manufactures didn't make developer mode friendly enough -- you'd be better off converting low-end Windows laptops instead.