With class components, lifecycle management is trickier to encapsulate and reuse since you have to split such things up and scatter them across several different methods or wrap the whole component in a HOC, and in general class components require more boilerplate. Thus you'll usually end up with code that's just a bit more spaghetty than with function components. With hooks, you can at least encapsulate some specific behavior behind exactly one function call without jumping through any extra hoops.