Where React usually gets complicated is when non-trivial state gets involved. Once you have state that needs to span your application and prop-drilling becomes

Where React usually gets complicated is when non-trivial state gets involved. Once you have state that needs to span your application and prop-drilling becomes too much of a drag, the misalignment between React's "pretend we're going to redraw everything" and "I'm only changing this one field in my state" causes most of the issues with React.