It's because Apple realizes that user replaceable components and ports aren't essential features that they make such great laptops. I'm a "pro" in the sense the I do work and coding on my laptop. I haven't used an Ethernet cable in maybe four years. I don't upgrade components, I just buy new machines every year (with the insane secondary market value of MacBooks this isn't even an expensive proposition). I don't want to compromise portability and battery life (remember, a lot of the design techniques to make the machine thinner open up more internal space for battery) for some features I'll rarely I'd ever use.