> For sure, it's important to keep an eye on the code review culture, though. It's easy for code review to degenerate into nitpicking small things like whitespace, naming, coding conventions - these should be handled by tools instead.

I agree with this, but think there needs to be some balance. My experience has been that people generally add rules over time while rarely removing them - usually to quell disagreements without regards to the benefit of standardising the answer versus the cost of more rules.