However, that's also a negative - all expansion is external. It has 6 Thunderbolt 2 ports, each offering 20 Gb/s bandwidth, so it's essentially an externalized PCI-E bus. But for some things, like 1 to 2.5 terabyte spinning drives, blu-ray burners, or HDMI capture, it's going to be physically unwieldy....
yeah, you get a spider. of course maybe someone else will provide a box in which all this thunderbolted stuff can fit. the next step would be to implement thunderbolt like capability via wifi or better. now you can put your peripherals pretty much anywhere you like.
Not to mention it needs a brushed aluminum finish to be recognizable.
Physically unwieldy? I’m not sure I agree. Considering the size of the previous MacPro line - a behemoth by today’s standards, the much smaller MacPro design, even with a few external peripherals, it will occupy less space. Indeed, in a way - it makes your work more portable - as you can tote that external drive with the big project from station to station (or to your home office).
But I do grasp the benefits of having lots of INTERNAL expansion. That is why I haven’t let go of my old Dual G5 PowerMac at home.