and most users wouldn't know that, either, as it's not mentioned anywhere,it's a little-known and curiously (or maybe not-so-curiously) underpublicized fact: Every Chromebook, whether it costs $150 or $1,500, comes with an expiration date attached — a point at which it'll no longer receive software updates and thus won't be advisable to use
- in the limited documentation that they would get with their New Machine.
Auto Update policy:
It's damn-near impossible for any normal person to know how long a Chromebook will continue to receive software updates — because (a) that information isn't listed in any even remotely prominent place, (b) it's not based on when the Chromebook itself went on sale but rather on when the processor inside the system first appeared on the platform ..
and (c) the only place such info is listed is in an obscure help document no typical user would ever encounter (or even realize exists).

maybe, I'd better tell my friend, about this, since He's bought such a beast, this year .. .