Except may be I can't afford the heavy Apple price tag right now and I only want a 256GB SSD and 8GB RAM to get me started while I save up for a few more months for the other upgrades... not everyone can afford to go all out and go full spec.
Or maybe i think I'm only going to need the lower spec, but having bought my nice new Mac I find it really easy to use and I'm a bit of a genius at this movie editing thing but I could be more of a genius if it was a bit faster... but hang on, now I need to buy a whole new laptop for another £3000. But until my big hollywood blockbuster I can't afford it :(