That's a pretty lousy estimated lifetime. If that is truly the case, it feels like planned obsolsense, as the rate of improvement in computing power has drastically slowed.
I figure it's a tradeoff. Speed and cost vs. lifespan.
(Effectively) Irreplacable batteries already limit the lifespan of many consumer devices to 3-4 years, so why limit the capabilities of the hardware to get a few years that won't be usable anyways… is how I imagine those conversations going.