I agree with the author's sentiment.
2011 MacBook Air user here. SSD failed a few months ago - replaced it with a 960GB SSD. Other than that, it has been flawless. The battery may be next on the list as it currently only lasts about three hours. I hook it up to a Thunderbolt display for Photoshop, the odd bit of GoPro editing and Garageband. I for the top CPU at the time, a 1.8GHz i7, so the only thing that holds it back is the lowly 4GB RAM.
I would love a speed bump and a retina display on both the laptop and external display, but Apple simply don't offer it, so when the machine dies, I'll have no choice but to go elsewhere for a replacement.