The whole idea behind RepRap is in the name. REPlicating RAPidprototyper. Not that there is anything wrong with machines that don't include any printed parts, just that they aren't RepRaps. The fewer specialized parts the better. That's why the Prusa is all printed parts, common threaded rod, nuts, etc. Even eliminating those would be a worthy goal, as long as overall quality isn't decreased.
That said, more inexpensive and high quality printers can only be a good thing, even if they aren't true RepRaps.