These will however also fail, and so what we would end up with are a number of sites with largely the same information, albeit with some difference in nuance that ultimately will coalesce along political lines. Some with maybe better tools for merging new edits but lacking in other respects. And that's not good either.
So Wikipedia should stay, and iron out the crinkles instead. Let's just not expect it to be perfect.
[0] as someone who never really understood the inner workings of Wikipedia, this article is really a goldmine - the not so NPOV notwithstanding.