That's Chromebook right out of my buying list then
It is not acceptable to me that a supplier artificially limits updating hardware to less than the hardware's expected lifespan.
If I call a plumber for a kitchen sink, he won't tell me that he can't do anything about it because the sink is more than 6 years old. Only in IT do you have companies arbitrarily decide to stop supporting something they sold. And here, it's even worse, because the expiry date is not tied to the sell date.
That is disgusting.