Batteries don't last this long, why does a dryer have to? it's not all about longevity ...
If a battery is a consumable, shouldn't it last only one charging cycle?
There’s no reason to introduce a new limitation unless the technology makes up for it in other ways. Having to replace a clothes dryer every two years would require the technology to be very good to justify such a burdensome task.
Or, a cost cutting measure of replacing a long-lasting ball bearing assembly with a shaft rotating in a vinyl cup which wears down to metal-on-metal like mine did after 3 years. Which is the sort of accelerated deprecation the OP was alluding to. Granted, the battery metaphor isn't great as energy storage tech is far from mature.
However, if you select the Samsung 7.5cf dryer, it also has free delivery. Of course, this is built into the price, and $550 for an appliance isn't pocket change.
also, where did they state the longevity?
The benefit reduces if you have a consumable component that needs changing, especially with the amount of e-waste that goes to landfill.
If my dryer was $50-$200 and could be carried in one hand, I'd be (grumpily) okay with it only lasting 2 years.
http://www.homedepot.com/p/Magic-Chef-Compact-1-5-cu-ft-Elec...