As mentioned in the other comments, code reviews are typically not done in the game industry, for example, or other write-once, never read scenarios. Very early stage startups typically don’t have formal code reviews either.
while that is true, and some of it is rational, other times it's just another stupid way people waste money and fuck up their projects. because even in a startup or a game there is code that people waste time debugging alone, or waiting for the one guy who knows it to get back from vacation, or out of bed
