Sigh, I don't want to get into this discussion again here. Do you consider yourself a professional? Do you need and use a workstation at work? If not, you have no standing to describe what "consumers like that" (or more accurately, their IT staff) want or would buy. I and can tell you that 99% of Mac Pro customers work in large enterprise settings where they will likely never even open their machines ever. If you have a problem or want an upgrade, call your IT department. You might hear more about 'prosumers' such as amateur photographers who fancy themselves needing a Mac Pro, but they are a minority and these computers are really not geared towards them.
It doesn't mean these customers don't know how or don't want to tinker, but they don't because their computers are provided by and used entirely for work. The same holds true regardless of where you got your workstation, be it Apple, Dell, HP or IBM. I will bold this: workstation computers are not meant to be worked on by the end user, no matter how competent that user is -- professional grade does not mean enthusiast grade.
On the other hand, there are tangible benefits to having space savings and a lower noise profile. When my nMP no longer cuts it and I want a new one, I'm going to email the manager of my lab and he'll have one delivered to my bench. That's how it's done in professional settings.
