3 years for $300 is acceptable, I guess. Would you really keep an Alienware for a dozen years, if it lasted that long? So far it seems most of them are fragile, regardless of price point. My daughter's Alienware lost the hard drive while she was in Spain doing an exchange-student thing. That was no fun for her. She had a lot of schoolwork (Europe photos, her art and some written work) on that drive which she needed, and of course, it wasn't backed up anywhere. She had to deal with the locals for a replacement, but I had her send the old drive back to get the data recovered, which fortunately it was. Age of the Alienware laptop at the time: about 1 year.
On the other hand, Sandy's 2 Sony VAIOs are going strong after at least 5 years. One of them gets heavy use too, by me.
No truly good laptop gets too much below a grand. I get that. But the reality is that the numbers are too rich for most of us, and we have to make do with what we can get in the few-hundred-dollar range. If it breaks in a few years, that's the way it goes.