Mac pro? seriously? Just because you don't have the money to own one that doesn't means that the Mac Pro is a flaw. The Mac pro is the best desktop computer out there. want the facts?
Are you kidding me? I work in enterprise IT. I manage high-end hardware that the Mac Pro can't even dream of keeping up with. Every single blade in each of my BladeCenters has more RAM than Mac Pro can even address(192 GB per blade). They aren't even new BladeCenters. They're actually pretty old, in computing years.
I've considered using a Mac Pro to replace my current home media server, but it won't be any faster than my 2012 MacBook Pro with an SSD and network-connected RAID. I use Mac Pros as servers with several of my clients. They aren't
bad, but unless you are doing very specific work (high end pro graphics), the Mac Pro is overkill. Its revision in 2013 was aimed solely at graphics professionals and specialty computing markets, whereas the previous generations of Mac Pros (and the also-unsucessful xserve) were significantly more flexible and worked as completely competent servers.
If you are using the Mac Pro as a desktop computer you are quite literally wasting more cycles than you are using. My Retina MacBook (as in, 12-inch, not Pro) browses the web and plays video just as well as a Mac Pro. The GPU in a Mac Pro is also not designed for gaming; you'd be better off with high-end 2015 iMac. Outside of intense tasks like advanced modeling, 4k compression, or virtualization, Xeon processors offer no real-world performance benefit over an i5 or i7. Nearly every modern computer is capable of handling whatever the average user throws at it without skipping a beat. "The best desktop computer out there" is anything with an i-series processor, an SSD, and at least 4 GB of RAM. In other words,
almost every computer sold since 2013.
As for the success or failure of the Mac Pro, ask yourself this: if the Mac Pro is such a great machine, why hasn't it had an update in the two years since it was announced? Because they aren't selling. That's not due to the cost -- it has the same base price as the hardware it replaced.