Implemented ESLint
Consistency is a really good thing to have in most cases.
Since we managed to leave outside the drama about the never-ending debate on "tabs vs spaces", the entire team has one standard set of rules to follow when writing code.

This was done by implementing ESLint across our projects. 

Among other benefits, this helps us keep things consistent in style and that we keep the complexity as low as possible. 

Annoying at first, yes. But once it becomes second nature, it will be very beneficial for everybody, including new future teammates.