I think the "new" Mac Pro ("trashcan Mac") is a joke; and it's not just because calling a, once again, forgotten and near abandoned 2013 model "new" in late 2015 is the kind of air-quote irony loved by techno hipsters.
While its trashcan form factor may work well for some (perhaps, as a new Mac mini pro, or maybe Mac Pro mini), it's inadequate for traditional Mac creatives/professionals. For real pros, it's a plain and simple failure.
Posted by MacRumors' forum member zephonic:
In fact, a lot of professional Mac users are still clutching to their aluminum tower "classic" Mac Pros ("cMP"). The latest 2010 and (meaninglessly bumped) 2012 cMP models are particularly coveted in forums like Mac Rumor's Mac Pro forums and holding on to their values well if you look around eBay or Other World Computing.
And for good reason. Those machines are just better than the trashcan Mac. Right now, a cMP simply spanks the trashcan Mac's performance. For example, with regard to top end performance, processor-wise, you can get a maxed out 12-core 3.46GHz cMP model that is just as fast as the top end 12-core 2.7GHz trashcan Mac.
In most every other important way, the cMP simply trounces the trashcan Mac. For storage, you can get larger capacities (e.g., 2TB, 4TB, and up) as well as way faster SSDs (e.g., running at near 6GB/sec). Video card options for the cMP obliterate the top end options on the trashcan Mac.
And the cMP also has tons of additional storage space with room for 2 optical drives, additional power supplies, slots for multiple PCI cards (e.g., video), drive bays for four 3.5” drives, etc. All in one nice, tidy, clean box.
Poor trashcan Mac users have been forced to live like animals with rats nests of external drives, cables, PCI cages (because lots of people still need expansion cards)—all of these things are big, clunky, with noisy fans (rendering the quietness and compactness of the trashcan Mac meaningless), all while sucking up more power than the tidy integrated cMP.
Adding insult to injury, all those external connections are relatively slow connections when compared to the cMPs fast PCI slots. Trying to run a high end video card through a Rube Goldberg external PCI cage via a Thunderbolt port is like trying to stuff a hippo in a pair of skinny jeans. It's not likely to work well, and even if it does, it won't be pretty.
This Mac Pro doesn't even have a PCI cage (that gets much uglier, fast). It's just a family Mac in the kitchen.
It's an ugly, noisy, power hungry rats nest compared to the clean singular cMP it replaced.
Next: Apple Needs to Reimagine a New and Improved Mac Pro ("iMP")