> Just like you wouldn’t get married to someone you’ve just met, you shouldn’t get into a long term partnership with someone you don’t know well enough.

This is IMHO by far the most important thing said in this article. I always find it strange when I see website proposing to match you with a co-founders or people looking for a co-founder by asking HN for instance. It's like asking on your blog "Hey readers! Anyone would like to marry me, I have an awesome idea about how we could raise our kids!".