Since when has the sole criterion for measuring expandability been how much crap one can shoehorn into an aluminum quadrate? The new Mac Pro was previewed at this years WWDC. It looks amazing, carrying an all new simple stunning form factor. There's been a lot of talk that it looks like the Death Star. That's incomplete. It's much more like the Death Star and the Obelisk from '2001: A Space Odyssey' had a baby, a beautiful alien baby, come to kill us all. Additionally, the new machine sports seemingly quiet, innovative effective cooling, it's available in beastly configurations at the outset, the ports even light up on rotation, and of course it has a bunch of Thunderbolt 2 ports.
So what's there for people not to like (the vast majority of whom will never buy a Mac Pro)? Well, in a word so called "expandability."