Last week the new MacBook Air line hit the market like a sophisticated sledgehammer. Every tech site worth its salt reviewed it, and they’re happy with the performance, battery life and everything. All those are irrelevant. Let me tell you why. My fiancée doesn’t wear pink unless it’s unavoidable. She doesn’t go around town wielding a trendy handbag just because it’s trendy. She gets her paycheck for what you’d consider…