No doubt about it, but look at it: Frankly, it looks like something you'd expect in some cheesy 60s scifi movie. People are used to appliances that are closed black boxes that just spew out what they're supposed to produce, they don't want to see the wiring under the board.
Yes, I do and yes, I agree, the Prusa is a great design and I love it every time I use it, but the topic here is the question why this didn't get mass appeal. And mass appeal is something gained and won by the way it looks. And this looks intimidating to the average Joe out there. It looks like something he won't get under control, and he's not going to shell out 740 bucks to find out whether he does.