> But you are overstating the lack of support for past ChromeOS devices, because for the enterprise and education markets the support timelines for Chromebooks have been the same as "forever".

ChromeOS devices fall out of support on a timeline. Google sometimes extends the timeline for some devices, and new devices have a longer timeline than in the past; maybe it's better for Education targeted devices, but the Chromebooks I've had for personal devices stopped getting updates and you're left with whatever state it is in; my first one stopped getting updates in the middle of the printing switch where cloud printing was discontinued and local printing didn't actually work.

My understanding is that Google has announced they will stop development for new ChromeOS devices and ten years after the last device is released (not purchased) support goes poof ... and I imagine support activity for the last 5 years of the last device's ten year support will be a lot less than the first 5 years.