I'm constantly frustrated when people make claims like that about 3D printers. You can absolutely make durable parts on a home 3D printer. I designed a whole remote control car to prove that [1], and even the gears are 3D printed. Despite the car having 1/4 horsepower and being able to flip itself backwards with all that torque, the gears never wear out. There is no such thing as "3D printers are for prototyping". They're a machine. They're for whatever you want them for. If you consider the parts okay for your non prototype use, then that's fine.

Also, this absolutely is for hobbyists. I'm not sure how that detracts from anything. Maybe the marketing is too suggestive that general consumers will want to build their own laptop, but that's fine. That's marketing. Personally I think the product is excellent as I've wanted an open laptop that runs all free software.

I've also had a laptop monitor fail on me, and had to connect it to an external monitor to recover the files.

[1] http://makezine.com/projects/3d-print-badass-rc-race-car/