If a keyboard can't handle "dust" then it's not a Pro keyboard. My MacBook Pro Retina 2012 traveled the world in all kinds of challenging outdoor environments and as long as liquid didn't go into the keyboard there was no worry.

I've always adored the MacBook Pro line since they were so solidly built. I've dropped a pre-unibody model where it got it a big dent in the chassis but it kept on trucking for years. Quality like that is worth paying for. "Keep away from dust" is not worth $3000.

It’s a portable. It’s meant to be in the environment around humans. Which means dust.

Sometimes I think Apple only intended for this laptop to be on display in a sealed box.

So you mean, real world conditions?