[BrandoElFollito]

Then how is the Apache web server peer reviewed? Or LaTeX? or some other open source software?

By means of people evaluating it (good, bad, knowledgeable or yahoo people), then you read their reports and you make up your mind.

When the subject is one I am an expert in, I will use it and tell everyone it is fine.

When the subject is not one I am an expert in, I will look at what others say and find out the ones who I can trust. This is how, say, Stack Overflow works. And it woks really fine.

The fact that the content is going to change is good. It means that there is a place where the knowledge is updated. Heck, it may become one day the ultimate reference. If it is handled properly it will have updates which keep track of the past.

I have a PhD in physics and had my fair share of publications in the medieval system of "peer reviewed, high impact journals". I am now in industry and I much more prefer to have multiple independent sources of truth and decide on my own. Not a single one is in a journal, all are in places which either state good stuff or are lost in a corner of Internet.