I recently moved from one team within my company that didn't do any type of code reviews whatsoever, to a team that does code-reviews-by-email pretty religously

I recently moved from one team within my company that didn't do any type of code reviews whatsoever, to a team that does code-reviews-by-email pretty religously (we don't require someone to OK the change before commit though). This one small behavioral change means a world of difference between quality and expertise on the two teams. I'll never work with a team again that doesn't do some form of code review/pull requests etc.