You are wrong on everything. Google gives 10 years of updates, once the support lifetime ends you can put flex on it, linux, but chromeos keeps working, you just stop getting updates. Mostly that is because a 10 year old device is pretty slow, you'll want to faster device.

I have one 10 year old mac laptop, all I can do it boot it and wait minutes for the login panel to show. Actually I should get rid of that as ewaste.