[galacticpony]

Just like the designers of the current Mac Pro, you don't get it.

This design (even though it doesn't work in reality) is about creating something that is functionally like the earlier Mac Pros. That means commodity off-the-shelf hardware can be used, not just specialized or outlandish components that are going to be very expensive, if anybody bothered to produce them at all. The current Mac Pro still ships with the outdated GPUs it originally was introduced with, with no upgrade path foreseeable.

[runamok]

And all of the performance improvements are in the GPU space. A 2 or 3 year old CPU is not that big a deal but a 2 or 3 year old GPU? I believe it's an order of magnitude slower (or more).

Here is an example of GPU improvements vs. CPU (although this is an older article) http://www.anandtech.com/show/7603/mac-pro-review-late-2013/...